Consume food (3)
I believe the answer is:
eat
'consume food' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for eat that I've seen before include "tolerate in diet" , "Do cats - bats? Do bats - cats? (Alice in Wonderland)" , "Break bread" , "Consume (food)" , "Ingest" .)