A bit of kebab and one doughnut left (9)
I believe the answer is:
abandoned
'left' is the definition.
(abandoning is a kind of leaving)
'a bit of kebab and one doughnut' is the wordplay.
'a bit of' indicates a hidden word (I've seen 'a bit' mean this (the answer is formed by a bit of the clue)).
'ABANDONED' can be found hidden inside 'kebab and one doughnut'.
(Other definitions for abandoned that I've seen before include "Derelict, deserted" , "Given up?" , "Obsolete" , "Deserted - shameless" , "Deserted; uninhibited" .)