Cook from Serbia (6)
I believe the answer is:
braise
'cook' is the definition.
(I know that braise is a more specific form of cook)
'from serbia' is the wordplay.
'from' is an anagram indicator (from the letters).
'serbia' anagrammed gives 'BRAISE'.
(Other definitions for braise that I've seen before include "Cook slowly with little water in closed container" , "Fry then stew slowly" , "Cook or stew slowly" , "Re bias (anag.)" , "Stew in a closed pan" .)