Sharp play on words chap supports (7)
I believe the answer is:
pungent
'sharp' is the definition.
(I've seen this before)
'play on words chap supports' is the wordplay.
'play on words' becomes 'pun' (synonyms).
'chap' becomes 'gent' (both can mean a man).
'supports' is a charade indicator (letters next to each other) (bottom letters provide a support for the top ones).
'pun'+'gent'='PUNGENT'
(Other definitions for pungent that I've seen before include "Sharp tasting/smelling" , "With a sharp taste or smell" , "delivering powerful smack" , "Acrid to smell" , "Strong-smelling" .)