Provides food (5)
'provides food' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for caters that I've seen before include "Provides what is needed, say food and drink" , "Does fare" , "Provides what is required" , "provides what's needed" , "'Supplies food, ready to eat (6)'" .)
(Other definitions for feeds that I've seen before include "Furnishes with food" , "Eats" .)