Couple with a place in France (5)
I believe the answer is:
dijon
But I can't explain it at all! Could you help me understand?
(Other definitions for dijon that I've seen before include "French town known for mustard" , "French city well-known for mustard" , "French city - type of mustard" , "City of eastern France, known for mustard" , "French city associated with mustard" .)