Wine that French accumulated in Caribbean island (10)
I believe the answer is:
martinique
'caribbean island' is the definition.
(island of the Lesser Antilles)
'wine that french' is the wordplay.
'wine' becomes 'martini' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'that french' becomes 'que' (French for 'that').
'martini'+'que'='MARTINIQUE'
'accumulated in' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for martinique that I've seen before include "French island in the West?Indies" , "French Caribbean island" , "Caribbean spot" .)