Sweet gal with nice shape (7)
I believe the answer is:
angelic
'sweet' is the definition.
('angelic' can be a synonym of 'sweet')
'gal with nice shape' is the wordplay.
'with' is a charade indicator (letters next to each other).
'shape' indicates an anagram.
'gal' after 'nice' is 'nicegal'.
'nicegal' with letters rearranged gives 'ANGELIC'.
(Other definitions for angelic that I've seen before include "Divine" , "Heavenly - entrancing" , "Extremely well-behaved" , "Pure; innocent" , "Of innocent beauty" .)