City in French Flanders (5)
I believe the answer is:
lille
'city in french flanders' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for lille that I've seen before include "Eurostar stop" , "Industrial city of northern France" , "[FRANCOPHOBIA] would prevent you appreciating it" , "N. French city" , "City in northern France, Flanders" .)