Food brought back from Edinburgh (4)
I believe the answer is:
grub
'food' is the definition.
(grub can informally mean food)
'brought back from edinburgh' is the wordplay.
'brought back' is a reversal indicator.
'from' indicates the answer is hidden within the clue.
'burg' is hidden in the letters of 'edinburgh'.
'burg' in reverse letter order is 'GRUB'.
(Other definitions for grub that I've seen before include "Caterpillar - food" , "Slang food for worm-like larva" , "Dig (up); hack writers' Street" , "Beetle larva" , "Gentle, food" .)