Optimistic woman had food (7)
I believe the answer is:
roseate
'optimistic' is the definition.
(I've seen this in another clue)
'woman had food' is the wordplay.
'woman' becomes 'rose' ().
'had food' becomes 'ate' (to eat is to have some food).
'rose'+'ate'='ROSEATE'
(Other definitions for roseate that I've seen before include "sort of pink?" , "Blushing" , "Colour associated with tern" , "Blooming" , "Overoptimistic" .)