Beer long brewed in French city (8)
I believe the answer is:
grenoble
'french city' is the definition.
(city in southeastern France)
'beer long brewed' is the wordplay.
'brewed' indicates anagramming the letters.
'beer'+'long'='beerlong'
'beerlong' with letters rearranged gives 'GRENOBLE'.
'in' is the link.
(Other definitions for grenoble that I've seen before include "French Alpine city" , "European city" , "French city and skiing centre" , "City of south-eastern France" , "City of alpine France, capital of the Isere department" .)