Border area where fight takes place between France and Spain (6)
I believe the answer is:
fringe
'border' is the definition.
(I know that fringe is a type of edging)
'place between france and spain' is the wordplay.
'place' becomes 'ring' (I can't explain this - if you can you should give a lot more credence to this answer).
'between' means one lot of letters goes inside another.
'france' becomes 'f'.
'and' means one lot of letters go next to another.
'spain' becomes 'e' (abbreviation for Espana).
'f'+'e'='fe'
'ring' inserted into 'fe' is 'FRINGE'.
'area where fight takes' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for fringe that I've seen before include "Border; unconventional" , "Less important" , "Perimeter" , "Hair hanging over the forehead" , "Rim" .)