Rum and raisin for Italian islander (9)
I believe the answer is:
sardinian
'italian islander' is the definition.
(Sardinia is an Italian island)
'rum and raisin' is the wordplay.
'rum' indicates anagramming the letters (rum can mean strange or unusual).
'and'+'raisin'='andraisin'
'andraisin' is an anagram of 'SARDINIAN'.
'for' acts as a link.
(Other definitions for sardinian that I've seen before include "Native of the Med's second largest island" , "Islander" , "from an Italian island" .)