Be longer wandering in French city (8)
I believe the answer is:
grenoble
'french city' is the definition.
(I've seen this before)
'be longer wandering' is the wordplay.
'wandering' indicates an anagram.
'be'+'longer'='belonger'
'belonger' is an anagram of 'GRENOBLE'.
'in' is the link.
(Other definitions for grenoble that I've seen before include "European city" , "City of southeast France" , "French Alpine city" , "City of alpine France, capital of the Isere department" , "City of SE France" .)