Tokyo's wrong Japanese city (5)
I believe the answer is:
kyoto
'japanese city' is the definition.
(I've seen this before)
'tokyo's wrong' is the wordplay.
'wrong' indicates an anagram.
'tokyo' is an anagram of 'KYOTO'.
(Other definitions for kyoto that I've seen before include "City of agreement on global warming" , "Old Japanese capital" , "Japanese capital before 1868" , "Former Japanese capital city - Tokyo (anag)" , "Tokyo (anag) - former capital of Japan" .)