Islanders unhappy deporting duke? Wait and see (9)
I believe the answer is:
taiwanese
'islanders' is the definition.
(the people of Taiwan, an island)
'unhappy deporting duke? wait and see' is the wordplay.
'unhappy' indicates anagramming the letters.
'deporting' suggests deleting specific letters.
'duke?' becomes 'd'.
'wait'+'and'+'see'='waitandsee'
'waitandsee' with 'd' removed is 'waitansee'.
'waitansee' anagrammed gives 'TAIWANESE'.
(Other definitions for taiwanese that I've seen before include "Asian" , "Islander" , "These islanders" , "Oriental type" , "oriental in character" .)