Able to return to a place of exile (4)
I believe the answer is:
elba
'a place of exile' is the definition.
(I've seen this before)
'able to return' is the wordplay.
'to return' shows that the letters should be reversed in order.
'able' backwards is 'ELBA'.
'to' is the link.
(Other definitions for elba that I've seen before include "Bale out of the Mediterranean island" , "part of Tuscany?" , "Napoleon's Mediterranean exile island" , "place for Napoleon" , "Island of Napoleon's first exile" .)