Island's temperature a winner with this writer (6)
I believe the answer is:
tahiti
'island's' is the definition.
(Tahiti is an example)
'temperature a winner with this writer' is the wordplay.
'temperature' becomes 't' (abbreviation).
'winner' becomes 'hit' (both can mean a successful creative venture).
'with' means one lot of letters go next to another.
'this writer' becomes 'i' (the person who is writing these clues).
't'+'a'+'hit'+'i'='TAHITI'
(Other definitions for tahiti that I've seen before include "French Polynesian island" , "part of Polynesia" , "An isle in the South Seas" , "South Pacific island, linked to Paul Gauguin and Robert Louis Stevenson" , "Romantic Polynesian island, capital Papeete" .)