The penalty is too much for her (3)
I believe the answer is:
ena
'her' is the definition.
(Ena is a woman's name)
'the penalty is too much' is the wordplay.
'is too much' indicates a hidden word (only some letters needed - the rest are 'too much').
'ENA' is hidden in the letters of 'penalty'.
'for' acts as a link.
(Other definitions for ena that I've seen before include "- - Sharples (TV)" , "- - Sharples ('Coronation Street')" , "First name of Coronation Street's Widow Sharples, d. 1980" .)