Greed woman's shown over food (7)
I believe the answer is:
avarice
'greed' is the definition.
(avarice is a kind of greed)
'woman's shown over food' is the wordplay.
'woman' becomes 'ava' ().
'shown over' is a charade indicator (letters next to each other) (in a down clue, some letters go above others).
'food' becomes 'rice' (rice is a kind of food).
'ava'+'rice'='AVARICE'
(Other definitions for avarice that I've seen before include "Eager desire" , "Greed, covetousness" , "Insatiable desire for wealth" , "Insatiable lust" , "Wanting to be rich" .)