Napoleon's exile isle (4)

I believe the answer is:

elba

'napoleon's exile isle' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for elba that I've seen before include "Abel (anag)" , "Napoleon prison isle" , "Italian isle" , "Napoleon's prison isle" , "Italian island" .)

I've seen this clue in the Universal.

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