Time for conclusion of hopeless complaint (5)

I believe the answer is:

bleat

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'complaint' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for bleat that I've seen before include "Plaintive cry" , "Make a noise like a sheep" , "Cry of animal" , "Cry of sheep or goat" , "Make complaint" .)

I've seen this clue in The Times.

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