Nectar ordered for islander (6)
I believe the answer is:
cretan
'for islander' is the definition.
(someone from Crete)
'nectar ordered' is the wordplay.
'ordered' indicates anagramming the letters.
'nectar' with letters rearranged gives 'CRETAN'.
(Other definitions for cretan that I've seen before include "Greek islander" , "A Mediterranean islander" , "From Greece" , "Native of Greek island south of mainland (6)" , "Of a Greek island, centre of the Minoan civilisation" .)