UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED
MANAGEMENT INVESTMENT COMPANIES

ITEM 1.                 REPORT TO STOCKHOLDERS.

The Semi-Annual Report to Stockholders is filed herewith.

Semi-Annual Report  |  June 30, 2013

WESTERN ASSET/CLAYMORE INFLATION-LINKED SECURITIES & INCOME FUND
(WIA)

Investment objectives

The Fund’s primary investment objective is to provide current income. Capital appreciation, when consistent with current income, is a secondary investment objective.

What’s inside

Letter to shareholders

Dear Shareholder,

We thank you for your investment in Western Asset/Claymore Inflation-Linked Securities & Income Fund (the “Fund”). As investment adviser for the Fund, we are pleased to submit the Fund’s semi-annual shareholder report for the six-month reporting period ended June 30, 2013.

For the six-month period ended June 30, 2013, the Fund returned -7.13% based on its net asset value (“NAV”)i and -7.43% based on its New York Stock Exchange (“NYSE”) market price per share. The Fund’s unmanaged benchmarks, the Barclays U.S. Government Inflation-Linked 1-10 Year Indexii and the Barclays U.S. Government Inflation-Linked All Maturities Indexiii, returned -5.23% and -7.84%, respectively, for the same period. All Fund returns cited — whether based on NAV or market price — assume the reinvestment of all distributions. Performance data reflects fees and expenses of the Fund. Past performance does not guarantee future results. The market price of the Fund’s shares fluctuates from time to time, and it may be higher or lower than the Fund’s NAV.

A number of adjustments were made to the Fund during the reporting period. Early in the period we increased our allocations to investment grade corporate Financials and Industrials and U.S. high yield, at the expense of U.S. TIPS Treasury Inflation-Protected Securities (“TIPS”).iv This was beneficial for performance during the first quarter of 2013. As valuations improved, we reduced our UK and Canadian inflation linked bond (“linker”) exposures in favor of U.S. nominal Treasuries and TIPS. Finally, we reduced our exposure to U.S. credit in the second quarter as the market rallied.

The Fund employed U.S. Treasury futures and options on U.S. Treasury futures as well as Euro-Bobl futures and options on Euro-Bund futures during the reporting period to manage its yield curvev positioning and duration.vi The use of these instruments, in aggregate, slightly detracted from performance. Currency forwards, which were used to manage our currency exposures, positively contributed to results.

The largest contributors to the Fund’s absolute performance during the reporting period were its exposures to UK and

Canadian inflation linked bonds and currency in the first quarter. The Fund’s allocation to mortgage-backed securities (“MBS”) was also additive for performance.

The largest detractor from the Fund’s absolute performance for the period was its allocation to U.S. TIPS which suffered significant losses in the second quarter as real and nominal yields rose globally. Having reduced exposure to credit securities early in the second quarter, their impact on the portfolio was muted.

As of June 30, 2013, the Fund’s market price of $11.96 per share represented a discount of 11.41% to its NAV of $13.50 per share. In each month of the period, the Fund provided its investors with a distribution of $0.032 per share. The most recent distribution represents an annualized distribution rate of 3.21% based on the Fund’s last closing market price of $11.96 as of June 30, 2013.

The Fund’s investment objective is to provide current income. Capital appreciation, when consistent with current income, is a secondary objective. Under normal market conditions, the Fund will invest:

·        At least 80% of its total managed assetsvii in inflation-linked securities

·        At least 60% of its total managed assets in U.S. Treasury Inflation Protected Securities (“TIPS”)

·        No more than 40% of its total managed assets in non-U.S. dollar investments, which gives the Fund the flexibility to invest up to 40% of its total managed assets in non-U.S. dollar inflation-linked securities (no more than 20% of its non-U.S. dollar exposure may be unhedged)

Each of the foregoing policies is a non-fundamental policy that may be changed without shareholder approval. The Fund has also adopted the following non-fundamental policy, which, to the extent required by applicable law, may only be changed after notice to shareholders: under normal market conditions, the Fund will invest at least 80% of its total managed assets in inflation-protected securities and non-inflation-protected securities and instruments with the potential to enhance the Fund’s income. The Fund will not invest in bonds that are below investment grade quality at the time of purchase. Up to 20% of the Fund’s portfolio securities may represent corporate debt securities of investment grade quality at the time of their purchase that are not inflation-linked securities. To the extent permitted by the foregoing policies, the Fund may invest in emerging market debt securities. Reverse repurchase agreements and other forms of leverage will not exceed 38% of the Fund’s total managed assets. The Fund currently expects that the average effective durationviii of its portfolio will range between zero and fifteen years, although this target duration may change from time to time. The Fund may enter into credit default swap contracts for investment purposes, to manage its credit risk or to add leverage.

Shareholders have the opportunity to reinvest their dividends from the Fund through the Dividend Reinvestment Plan (“DRIP”), which is described in detail on page 28 of this report. In general, if shares are trading at a discount to NAV, the DRIP takes advantage of the discount by reinvesting the monthly dividend distribution in common shares of the Fund purchased in the

market at a price less than NAV. Conversely, when the market price of the Fund’s common shares is at a premium above NAV, the DRIP reinvests participants’ dividends in newly-issued common shares at NAV, subject to an IRS limitation that the purchase price cannot be more than 5% below the market price per share. The DRIP provides a cost-effective means to accumulate additional shares.

We appreciate your investment and look forward to serving your investment needs in the future. For the most up-to-date information on your investment, please visit the Fund’s website at www.guggenheiminvestments.com/wia.

Sincerely,

Western Asset Management Company

July 26, 2013

i                Net asset value (“NAV”) is calculated by subtracting total liabilities, including liabilities associated with financial leverage (if any) from the closing value of all securities held by the Fund (plus all other assets) and dividing the result (total net assets) by the total number of the common shares outstanding. The NAV fluctuates with changes in the market prices of securities in which the Fund has invested. However, the price at which an investor may buy or sell shares of the Fund is the Fund’s market price as determined by supply of and demand for the Fund’s shares.

ii             The Barclays U.S. Government Inflation-Linked 1-10 Year Index measures the performance of the intermediate U.S. TIPS market.

iii          The Barclays U.S. Government Inflation-Linked All Maturities Index measures the performance of the U.S. TIPS market. The Index includes TIPS with one or more years remaining maturity with total outstanding issue size of $500 million or more.

iv           U.S. Treasury Inflation-Protected Securities (“TIPS”) are inflation-indexed securities issued by the U.S. Treasury in five-year, ten-year and twenty-year maturities. The principal is adjusted to the Consumer Price Index, the commonly used measure of inflation. The coupon rate is constant, but generates a different amount of interest when multiplied by the inflation-adjusted principal.

v              The yield curve is the graphical depiction of the relationship between the yield on bonds of the same credit quality but different maturities.

vi            Duration is the measure of the price sensitivity of a fixed-income security to an interest rate change of 100 basis points. Calculation is based on the weighted average of the present values for all cash flows.

vii        “Total managed assets” equals the total assets of the Fund (including any assets attributable to leverage) minus accrued liabilities (other than liabilities representing leverage).

viii     Effective duration measures the expected sensitivity of market price to changes in interest rates, taking into account the effects of structural complexities. (For example, some bonds can be prepaid by the issuer.)

Investment commentary

Economic review

The U.S. economy continued to grow over the six months ended June 30, 2013 (the “reporting period”), but the pace was far from robust. Looking back, U.S. gross domestic product (“GDP”)i growth, as reported by the U.S. Department of Commerce, was an anemic 0.1% during the fourth quarter of 2012. This weakness was partially driven by moderating private inventory investment and federal government spending. Economic growth then improved, as first quarter 2013 GDP growth was 1.1%. Accelerating growth was due, in part, to strengthening consumer spending, which rose 2.3% during the first quarter, versus a 1.7% increase during the previous quarter. The U.S. Department of Commerce’s initial reading for second quarter 2013 GDP growth, released after the reporting period ended, was 1.7%. This increase was partially driven by increases in non-residential fixed investment and exports, along with a smaller decline in federal government spending versus the previous quarter.

While there was some improvement in the U.S. job market, unemployment remained elevated throughout the reporting period. When the period began, unemployment, as reported by the U.S. Department of Labor, was 7.9%. Unemployment then fell to 7.7% in February, 7.6% in March and 7.5% in April. It then edged up to 7.6% in May and was unchanged in June. In an encouraging sign, an average of almost 202,000 jobs were created per month during the first half of 2013. In contrast, the monthly average was roughly 183,000 in 2012. In addition, the percentage of longer-term unemployed has declined, as roughly 36.7% of the 11.8 million Americans looking for work in June 2013 have been out of work for more than six months, versus 38.1% in January 2013.

Meanwhile, the housing market brightened, as sales generally improved and home prices continued to rebound. According to the National Association of Realtors (“NAR”), existing-home sales dipped 1.2% on a seasonally adjusted basis in June 2013 versus the previous month and were 1.52% higher than in June 2012. In addition, the NAR reported that the median existing-home price for all housing types was $214,200 in June 2013, up 13.5% from June 2012. This marked the sixteenth consecutive month that home prices rose compared to the same period a year earlier. While the inventory of homes available for sale rose 1.9% in June 2013 to a 5.2 month supply at the current sales pace, it was 7.6% lower than in June 2012.

While manufacturing activity was weak in many international developed countries, it was generally positive in the U.S. Based on the Institute for Supply Management’s Purchasing Managers’ Index (“PMI”)ii, the U.S. manufacturing sector expanded during the first four months of the reporting period. Manufacturing then experienced a setback, falling from 50.7 in April 2013 to 49.0 in May (a reading below 50 indicates a contraction, whereas a reading above 50 indicates an expansion). However, manufacturing then moved back into expansion territory in June, as the PMI increased to 50.9. During June, 12 of the 18 industries within the PMI expanded, versus 10 expanding the prior month.

Investment commentary (cont’d)

Market review

Q. How did the Federal Reserve Board (“Fed”)iii respond to the economic environment?

A. The Fed took a number of actions as it sought to meet its dual mandate of fostering maximum employment and price stability. As has been the case since December 2008, the Fed kept the federal funds rateiv at a historically low range between zero and 0.25%. At its meeting in December 2012, prior to the beginning of the reporting period, the Fed announced that it would continue purchasing $40 billion per month of agency mortgage-backed securities (“MBS”), as well as initially purchasing $45 billion a month of longer-term Treasuries. The Fed also said that it would keep the federal funds rate on hold “...as long as the unemployment rate remains above 6.5%, inflation between one and two years ahead is projected to be no more than a half percentage point above the Committee’s 2.0% longer-run goal, and longer-term inflation expectations continue to be well anchored.” At its meeting that ended on June 19, 2013, the Fed did not make any material changes to its official policy statement. However, in a press conference following the meeting, Fed Chairman Bernanke said “...the Committee currently anticipates that it would be appropriate to moderate the monthly pace of purchases later this year; and if the subsequent data remain broadly aligned with our current expectations for the economy, we would continue to reduce the pace of purchases in measured steps through the first half of next year, ending purchases around midyear.” This initially triggered a sharp sell-off in both the stock and bond markets. While the stock market subsequently rallied and reached a new record high on July 12, the bond market did not rebound as sharply. As a result, Treasury yields remained sharply higher than they were prior to Chairman Bernanke’s press conference. At its meeting that ended on July 31, 2013, after the reporting period ended, the Fed did not institute any policy changes and left its $85 billion a month asset purchase program intact.

Q. Did Treasury yields trend higher or lower during the six months ended June 30, 2013?

A. Both short- and long-term Treasury yields moved sharply higher during the reporting period. When the period began, the yield on the two-year Treasury was 0.25%. It fell as low as 0.20% in late April/early May 2013 and was as high as 0.43% on June 25, 2013, before ending the period at 0.36%. The yield on the ten-year Treasury began the period at 1.78%. Ten-year Treasuries reached a low of 1.66% in early May 2013 and peaked at 2.60% on June 25, 2013, before edging down to 2.52% at the end of the period.

Q. What was the inflationary environment during the reporting period?

A. Inflation was relatively benign during the reporting period. For the six months ended June 30, 2013, the seasonally unadjusted rate of inflation, as measured by the Consumer Price Index for All Urban Consumers (“CPI-U”)v, was 1.70%. The CPI-U less food and energy was 1.13% over the same time frame. Inflation-protected securities generated weak results during the reporting period due to moderating expectations for inflation and rising interest rates. During the six months

ended June 30, 2013, the Barclays U.S. TIPS Indexvi fell 7.39%.

Q. What factors impacted the spread sectors (non-Treasuries) during the reporting period?

A. Most spread sectors performed poorly during the reporting period. Spread sector demand was often solid during the first four months of the period as investors looked to generate incremental yield in the low interest rate environment. Even so, there were several periods of volatility given a number of macro issues, including the European sovereign debt crisis, mixed economic data and concerns related to the U.S. “fiscal cliff” and sequestration. The spread sectors then weakened over the last two months of the period amid sharply rising interest rates given the Fed’s plan to begin tapering its asset purchase program sooner than previously anticipated. The majority of spread sectors generated negative absolute returns and performed largely in line with equal-durationvii Treasuries during the reporting period as a whole. For the six months ended June 30, 2013, the Barclays U.S. Aggregate Indexviii fell 2.44%.

Q. How did the emerging market debt asset class perform over the reporting period?

A. The asset class generated poor results during the six months ended June 30, 2013. Aside from a brief rally in April 2013, the asset class fell during the other five months of the reporting period. This weakness was triggered by a number of factors, including concerns over moderating global growth, fears of a “hard landing” for China’s economy, generally weaker commodity prices and sharply rising U.S. interest rates. Overall, the JPMorgan Emerging Markets Bond Index Global (“EMBI Global”)ix fell 8.22% over the six months ended June 30, 2013.

Performance review

For the six months ended June 30, 2013, Western Asset/Claymore Inflation-Linked Securities & Income Fund returned -7.13% based on its net asset value (“NAV”)x and -7.43% based on its New York Stock Exchange (“NYSE”) market price per share. The Fund’s unmanaged benchmarks, the Barclays U.S. Government Inflation-Linked 1-10 Year Indexxi and the Barclays U.S. Government Inflation-Linked All Maturities Indexxii, returned -5.23% and -7.84%, respectively, for the same period. The Barclays World Government Inflation-Linked All Maturities Indexxiii and the Fund’s Custom Benchmarkxiv returned -7.31% and -7.42%, respectively, over the same time frame.

During this six-month period, the Fund made distributions to shareholders totaling $0.19 per share, which may have included a return of capital.# The performance table shows the Fund’s six-month total return based on its NAV and market price as of June 30, 2013. Past performance is no guarantee of future results.

#         The actual source of the Fund’s 2013 fiscal year distributions may be from net investment income, return of capital or a combination of both. Shareholders will be informed of the tax characteristics of the distributions after the close of the 2013 fiscal year.

Investment commentary (cont’d)

Performance Snapshot as of June 30, 2013 (unaudited)

All figures represent past performance and are not a guarantee of future results.

*       Total returns are based on changes in NAV or market price, respectively. Returns reflect the deduction of all Fund expenses, including management fees, operating expenses, and other Fund expenses. Returns do not reflect the deduction of brokerage commissions or taxes that investors may pay on distributions or the sale of shares.

†        Total return assumes the reinvestment of all distributions, including returns of capital, if any, at NAV.

‡       Total return assumes the reinvestment of all distributions, including returns of capital, if any, in additional shares in accordance with the Fund’s Dividend Reinvestment Plan.

As always, thank you for your confidence in our stewardship of your assets.

Sincerely,

Western Asset Management Company

August 1, 2013

RISKS: Bonds are subject to a variety of risks, including interest rate, credit and inflation risks. As interest rates rise, bond prices fall, reducing the value of a fixed-income investment’s price. The Fund is subject to the additional risks associated with inflation-protected securities, including liquidity risk, prepayment risk, extension risk and deflation risk. Investments in foreign companies, including emerging markets, involve risks beyond those inherent solely in domestic investments. Leverage may cause a fund to be more volatile than if the fund had not been leveraged, which may increase the risk of investment loss. To the extent that the Fund invests in asset-backed, mortgage-backed or mortgage-related securities, its exposure to prepayment and extension risks may be greater than investments in other fixed-income securities. International investments are subject to currency fluctuations, as well as social, economic and political risks. These risks are magnified in emerging markets.

All investments are subject to risk including the possible loss of principal. Past performance is no guarantee of future results. All index performance reflects no deduction for fees, expenses or taxes. Please note that an investor cannot invest directly in an index.

The information provided is not intended to be a forecast of future events, a guarantee of future results or investment advice. Views expressed may differ from those of the firm as a whole.

i                Gross domestic product (“GDP”) is the market value of all final goods and services produced within a country in a given period of time.

ii             The Institute for Supply Management’s PMI is based on a survey of purchasing executives who buy the raw materials for manufacturing at more than 350 companies. It offers an early reading on the health of the manufacturing sector.

iii          The Federal Reserve Board (“Fed”) is responsible for the formulation of policies designed to promote economic growth, full employment, stable prices and a sustainable pattern of international trade and payments.

iv           The federal funds rate is the rate charged by one depository institution on an overnight sale of immediately available funds (balances at the Federal Reserve) to another depository institution; the rate may vary from depository institution to depository institution and from day to day.

v              The Consumer Price Index for All Urban Consumers (“CPI-U”) is a measure of the average change in prices over time of goods and services purchased by households, which covers approximately 87% of the total population and includes, in addition to wage earners and clerical worker households, groups such as professional, managerial and technical workers, the self-employed, short-term workers, the unemployed and retirees and others not in the labor force.

vi           The Barclays U.S. TIPS Index represents an unmanaged market index made up of U.S. Treasury Inflation-Linked Index securities.

vii        Duration is the measure of the price sensitivity of a fixed-income security to an interest rate change of 100 basis points. Calculation is based on the weighted average of the present values for all cash flows.

viii     The Barclays U.S. Aggregate Index is a broad-based bond index comprised of government, corporate, mortgage- and asset-backed issues, rated investment grade or higher, and having at least one year to maturity.

ix           The JPMorgan Emerging Markets Bond Index Global (“EMBI Global”) tracks total returns for U.S. dollar-denominated debt instruments issued by emerging market sovereign and quasi-sovereign entities: Brady bonds, loans, Eurobonds and local market instruments.

x              Net asset value (“NAV”) is calculated by subtracting total liabilities and outstanding preferred stock (if any) from the closing value of all securities held by the Fund (plus all other assets) and dividing the result (total net assets) by the total number of the common shares outstanding. The NAV fluctuates with changes in the market prices of securities in which the Fund has invested. However, the price at which an investor may buy or sell shares of the Fund is the Fund’s market price as determined by supply of and demand for the Fund’s shares.

xi           The Barclays U.S. Government Inflation-Linked 1-10 Year Index measures the performance of the intermediate U.S. TIPS market.

xii        The Barclays U.S. Government Inflation-Linked All Maturities Index measures the performance of the U.S. TIPS market. The Index includes TIPS with one or more years remaining maturity with total outstanding issue size of $500 million or more.

xiii     The Barclays World Government Inflation-Linked All Maturities Index measures the performance of the major government inflation-linked bond markets.

xiv      The Custom Benchmark is comprised of 90% Barclays U.S. Government Inflation-Linked All Maturities Index and 10% Barclays U.S. Credit Index. The Barclays U.S. Credit Index is an index composed of corporate and non-corporate debt issues that are investment grade (rated Baa3/BBB- or higher).

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Fund at a glance† (unaudited)

Investment breakdown (%) as a percent of total investments

†       The bar graph above represents the composition of the Fund’s investments as of June 30, 2013 and December 31, 2012 and does not include derivatives such as forward foreign currency contracts, futures contracts, written options and swap contracts. The Fund is actively managed. As a result, the composition of the Fund’s investments is subject to change at any time.

‡       Represents less than 0.1%.

Spread duration (unaudited)

Economic Exposure — June 30, 2013

Spread duration measures the sensitivity to changes in spreads. The spread over Treasuries is the annual risk-premium demanded by investors to hold non-Treasury securities. Spread duration is quantified as the % change in price resulting from a 100 basis points change in spreads. For a security with positive spread duration, an increase in spreads would result in a price decline and a decline in spreads would result in a price increase. This chart highlights the market sector exposure of the Fund’s sectors relative to the selected benchmark sectors as of the end of the reporting period.

Effective duration (unaudited)

Interest Rate Exposure — June 30, 2013

Effective duration measures the sensitivity to changes in relevant interest rates. Effective duration is quantified as the % change in price resulting from a 100 basis points change in interest rates. For a security with positive effective duration, an increase in interest rates would result in a price decline and a decline in interest rates would result in a price increase. This chart highlights the interest rate exposure of the Fund’s sectors relative to the selected benchmark sectors as of the end of the reporting period.

Schedule of investments (unaudited)

June 30, 2013

Western Asset/Claymore Inflation-Linked Securities & Income Fund

See Notes to Financial Statements.

Western Asset/Claymore Inflation-Linked Securities & Income Fund

See Notes to Financial Statements.

Schedule of investments (unaudited) (cont’d)

June 30, 2013

Western Asset/Claymore Inflation-Linked Securities & Income Fund

See Notes to Financial Statements.

Western Asset/Claymore Inflation-Linked Securities & Income Fund

See Notes to Financial Statements.

Statement of assets and liabilities (unaudited)

June 30, 2013

See Notes to Financial Statements.

Statement of operations (unaudited)

For the Six Months Ended June 30, 2013

See Notes to Financial Statements.

Statements of changes in net assets

See Notes to Financial Statements.

Financial highlights

For a share of capital stock outstanding throughout each year ended December 31, unless otherwise noted: