Bishop comes to unusual Serbian city (8)
I believe the answer is:
brisbane
'city' is the definition.
(Brisbane is an example)
'bishop comes to unusual serbian' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'comes to' is a charade indicator (letters next to each other).
'unusual' indicates an anagram.
'serbian' with letters rearranged gives 'risbane'.
'b'+'risbane'='BRISBANE'
(Other definitions for brisbane that I've seen before include "Australian city" , "port" , "Aussie location" , "There be bairns in Australia" , "City in Queensland" .)