Biting man follows word-play (7)
I believe the answer is:
pungent
'biting' is the definition.
(I know that biting can be written as pungent)
'man follows word-play' is the wordplay.
'man' becomes 'gent' (gent is a kind of man).
'follows' says to put letters next to each other.
'word-play' becomes 'pun'.
'gent' after 'pun' is 'PUNGENT'.
(Other definitions for pungent that I've seen before include "Offensive" , "Acrid; sarcastic (humour)" , "Penetrating" , "Biting" , "Incisive" .)