Habitual greed (8)
I believe the answer is:
gluttony
'habitual greed' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for gluttony that I've seen before include "bingeing" , "Greed in eating" , "Habitual greed (for food)" , "Habitual eating to excess" , "A deadly sin" .)