Food sent back - some chocolate fudge (4)
I believe the answer is:
feta
'food' is the definition.
(type of cheese)
'sent back some chocolate fudge' is the wordplay.
'sent back' is a reversal indicator.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'atef' can be found hidden inside 'chocolate fudge'.
'atef' written backwards gives 'FETA'.
(Other definitions for feta that I've seen before include "Salty Greek cheese" , "Low-fat cheese" , "Type of cheese" , "Goat's or sheep's milk cheese" , "Eastern Mediterranean cheese" .)