French city near the Belgian border (5)
I believe the answer is:
lille
'french city near the belgian border' 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 "Feeling unwell in the French town" , "Industrial city of northern France" , "European city" , "Stop before Paris" , "N. French city" .)