Crossword Genius

Banish in former French island (5)

Ross

I believe the answer is:

exile

'banish' is the definition.
(thesaurus)

'former french island' is the wordplay.
'former' becomes 'ex'.
'french island' becomes 'ile' (French for 'island').
'ex'+'ile'='EXILE'

'in' is the link.

(Other definitions for exile that I've seen before include "Eject from country" , "Ostracism" , "eg Napoleon on Elba" , "Ban to abroad" , "Overseas banishment" .)

I've seen this clue in The Telegraph.
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