Polynesian island (4,4)
'polynesian island' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tahiti that I've seen before include "Pacific island associated with Gauguin" , "South Pacific island, linked to Paul Gauguin and Robert Louis Stevenson" , "I hit at the tropical island" , "One of the Society Islands" , "South Seas island, capital Papeete" .)
'polynesian island' is the definition.
(I've seen this in another clue)
This is all the clue.