Diner or chophouse (6)
I believe the answer is:
eatery
'diner or chophouse' is the definition.
(I know that diner is a type of eatery)
This is all the clue.
(Other definitions for eatery that I've seen before include "diner" , "Restaurant, cafe" , "[BISTRO]" , "Place serving food" , "Brasserie" .)