Any minute now, they'll capture donkey for writer (7)
I believe the answer is:
sassoon
'writer' is the definition.
(I know that Sassoon is a poet)
'any minute now they'll capture donkey' is the wordplay.
I cannot really understand how this works, but
'donkey' could be 'ass' (ass is a term for a donkey) and 'ass' is found in the answer.
'any minute' could be 'soon' (I've seen this in another clue) and 'soon' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'for' is the link.
Can you help me to learn more?
(Other definitions for sassoon that I've seen before include "Siegfried --, English poet and novelist" , "Siegfried --, poet and writer" , "Poet condemning war" , "Siegfried ---, war poet" , "Siegfried --, English writer" .)