Self-service eatery (9)
I believe the answer is:
cafeteria
'self-service eatery' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for cafeteria that I've seen before include "Self-service eating place" , "Self-service eatery" , "Self-help facility" , "where food can be picked up" , "place of refreshment" .)