Defaced American posters lead to terse complaint (7)

I believe the answer is:

ailment

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'complaint' is the definition.
(I know that complaint can be written as ailment)

I can't explain the rest of the clue.

(Other definitions for ailment that I've seen before include "I lament (anag.)" , "Tummy upset, for instance" , "Complaint, affliction" , "Physical disorder" , "Sickness" .)

I've seen this clue in The Daily Express.

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