City in northern France (5)
I believe the answer is:
lille
'city in northern france' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lille that I've seen before include "Industrial city of northern France" , "European city" , "City in northern France, Flanders" , "Eurostar stop" , "City of northern France, close to Belgium" .)