Eat greedily (5)
I believe the answer is:
scoff
'eat greedily' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for scoff that I've seen before include "Deride - guzzle" , "Furiously swallow" , "Speak contemptuously or drink informally" , "Devour (informal)" , "Quickly swallow" .)