Absurd how struggle ends? (5)

I believe the answer is:

inane

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'absurd' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for inane that I've seen before include "Silly, witless" , "Puerile" , "Stupid and silly" , "Lacking meaning" , "Silly or senseless" .)

I've seen this clue in The Sun.

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