Aims often broken? (9)

I believe the answer is:

manifesto

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But I can't explain it at all! Could you help me understand?

(Other definitions for manifesto that I've seen before include "Pre-election policy declaration" , "Public policy declaration" , "Soften aim (anag) - platform" , "electoral programme" , "Publication containing political programme" .)

I've seen this clue in The Times.

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