Continental area has sufficient power to support French island (7)
I believe the answer is:
african
'continental' is the definition.
(I've seen this before)
'area has sufficient power to support french island' is the wordplay.
I cannot quite see how this works, but
'area' could be 'can' (can is a kind of area) and 'can' is found in the answer.
'french' could be 'fr' (abbreviation) and 'fr' is found within the answer.
'island' could be 'i' (geographical abbreviation) and 'i' is located in the answer.
A single letter 'a' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for african that I've seen before include "One from south of the Mediterranean" , "from Liberia?" , "Bogart's Queen" , "Continental" , "One type of elephant" .)