Want rep lost in city (7)
I believe the answer is:
antwerp
'city' is the definition.
(Antwerp is an example)
'want rep lost' is the wordplay.
'lost' indicates an anagram.
'want'+'rep'='wantrep'
'wantrep' is an anagram of 'ANTWERP'.
'in' acts as a link.
(Other definitions for antwerp that I've seen before include "Belgian port and province" , "Province and port of Belgium" , "9/11 [OLYMPIC VENUE]" , "European city" , "Wrap net around this Belgian city" .)