Good contest for girl (5)
I believe the answer is:
grace
'good' is the definition.
(I know that grace is a type of beneficence)
'contest for girl' is the wordplay.
'contest' becomes 'race' (race is a kind of contest).
'for' is a charade indicator (letters next to each other) (I've seen this in other clues).
'girl' becomes 'g'.
'race' put after 'g' is 'GRACE'.
(Other definitions for grace that I've seen before include "beauty of movement" , "34 [CRICKETER]" , "Poise" , "kindness" , "Comeliness" .)