Some welcome zest in Mediterranean food (4)
I believe the answer is:
meze
'mediterranean food' is the definition.
'some welcome zest in' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'MEZE' can be found hidden inside 'welcome zest in'.
(Other definitions for meze that I've seen before include "Mediterranean snacks" , "Selection of small dishes served in Greek or Turkish cuisine" , "Mediterranean appetisers" , "Greek appetiser" , "Turkish hors d'oeuvres" .)