Claymore Exchange-Traded Fund Trust-Designate a new effective date for a post-effective amendment previously for 485(a) (485BXT)

As filed with the Securities and Exchange Commission on December 28, 2007

SECURITIES ACT FILE NO. 333-134551 INVESTMENT COMPANY ACT FILE NO. 811-21906 ================================================================================ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-1A REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 |X| Pre-Effective Amendment No. |_| Post Effective Amendment No. 39 |X| and/or REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 |X| Amendment No. 42 |X| (Check appropriate box or boxes)

CLAYMORE EXCHANGE-TRADED FUND TRUST
(EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

2455 CORPORATE WEST DRIVE
LISLE, ILLINOIS 60532
(Address of Principal Executive
Offices)

[phone]
Registrant's Telephone Number

NICHOLAS DALMASO, ESQ.
CLAYMORE ADVISORS, LLC
2455 CORPORATE WEST DRIVE
LISLE, ILLINOIS 60532
(Name and Address of Agent for Service)

Copy to:
STUART M. STRAUSS, ESQ.
CLIFFORD CHANCE US LLP
31 WEST 52ND STREET
NEW YORK, NEW YORK 10019

APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:

IT IS PROPOSED THAT THIS FILING WILL BECOME EFFECTIVE (CHECK APPROPRIATE BOX)

_________ IMMEDIATELY UPON FILING PURSUANT TO PARAGRAPH (B) OF RULE 485.

X ON JANUARY 7, 2008 PURSUANT TO PARAGRAPH (B) OF RULE 485.

_________ 60 DAYS AFTER FILING PURSUANT TO PARAGRAPH (A)(1) OF RULE 485.

_________ ON [DATE] PURSUANT TO PARAGRAPH (A) OF RULE 485.

_________ 75 DAYS AFTER FILING PURSUANT TO PARAGRAPH (A)(2) OF RULE 485.

_________ ON [DATE] PURSUANT TO PARAGRAPH (A) OF RULE 485.

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The sole purpose of this filing is to delay the effectiveness of the Trust's Post-Effective Amendment No. 36 to its Registration Statement until January 7, 2008. Parts A, B and C of Registrant's Post-Effective Amendment No. 36 under the Securities Act of 1933 and Amendment No. 39 under the Investment Company Act of 1940, filed on October 16, 2007, are incorporated by reference herein.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Lisle and State of Illinois on the 28th day of December, 2007.

CLAYMORE EXCHANGE-TRADED FUND TRUST

By: /s/ Nicholas Dalmaso ------------------------------ Nicholas Dalmaso Chief Executive Officer

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the date indicated.

SIGNATURES TITLE DATE * December 28, 2007 -------------------------- Randall C. Barnes Trustee * December 28, 2007 -------------------------- Ronald A. Nyberg Trustee * December 28, 2007 -------------------------- Ronald E. Toupin, Jr. Trustee /s/ Nicholas Dalmaso December 28, 2007 -------------------------- Trustee and Chief Nicholas Dalmaso Executive Officer /s/ Steven M. Hill December 28, 2007 -------------------------- Treasurer, Chief Financial Steven M. Hill Officer and Chief Accounting Officer */s/ Nicholas Dalmaso December 28, 2007 -------------------------- Nicholas Dalmaso Attorney-In-Fact, pursuant to power of attorney