Substandard food? (4)
I believe the answer is:
eats
'food?' is the definition.
(eats is a kind of food)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for eats that I've seen before include "worrying" , "Food (informal)" , "Is not any faster" , "corrodes" , "Scoff" .)