Waste deep-fried food (7)
I believe the answer is:
fritter
I believe this clue is a double definition.
'waste' is the first definition.
(I know that fritter is a more specific form of the action the waste)
'deep-fried food' is the second definition.
(I know that fritter is a type of deep-fried food)
(Other definitions for fritter that I've seen before include "bit of batter" , "Waste - fried food" , "Waste time or money on frivolities" , "Food fried in batter" , "Battered food - waste" .)