Island birthplace of Napoleon (7)
I believe the answer is:
corsica
'island birthplace of napoleon' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for corsica that I've seen before include "Mediterranean island, birthplace of Napoleon" , "Napoleon Bonaparte was born on this French island" , "Napoleon's birth island" , "Island of W Italy, capital Ajaccio" , "French territory" .)