Use fists about a middle-age spread? (6)
I believe the answer is:
paunch
'use fists' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'a middle-age spread?' is the wordplay.
I cannot quite see how this works, but
'a' is present in the answer.
The remaining letters 'punch' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'about' acts as a link.
Can you help me to learn more?
(Other definitions for paunch that I've seen before include "Large stomach or belly" , "Beer-belly" , "Protruding stomach" , "corporation" , "Gut" .)