Feels bitter about topless awards (7)
I believe the answer is:
resents
'feels bitter about' is the definition.
('resent' can be a synonym of 'feel bitter about')
'topless awards' is the wordplay.
'topless' means to remove the first letter.
'awards' becomes 'presents' ('present' can be a synonym of 'award').
'presents' with its initial letter taken away is 'RESENTS'.
(Other definitions for resents that I've seen before include "grudges" , "Begrudges" , "Takes offence" .)