Stuffed diner's request (5,3)
I believe the answer is:
doggy bag
'stuffed diner's request' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for doggy bag that I've seen before include "It's for when one orders too much when eating out" , "Leftovers receptacle" , "Container for what you can't eat when dining out" , "For restaurant food that a customer didn't eat" , "In which to take away food from the table" .)