Island Napoleon left to meet his Waterloo? (4)

I believe the answer is:

elba

(Other definitions for elba that I've seen before include "Napoleon's plaint: 'Able was I ere I saw . . . .'" , "Island where Napoleon was exiled" , "Island off Italy" , "Island in the Med" , "Exile isle for Napoleon" .)

I've seen this clue in The Guardian.

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