Pacific island republic (4)
I believe the answer is:
fiji
'pacific island republic' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for fiji that I've seen before include "Country of many islands" , "Pacific island nation, capital Suva" , "South Pacific republic of 844 islands" , "South Pacific archipelago" , "Pacific island member of the Commonwealth, capital Suva" .)