Eat gluttonously (5)
I believe the answer is:
gorge
'eat gluttonously' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gorge that I've seen before include "Make a pig of oneself" , "In which a river may flow" , "something close to Cheddar?" , "Cheddar, say" , "Defile; stuff oneself" .)