Moira confused an islander (5)
I believe the answer is:
maori
'islander' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'moira confused' is the wordplay.
'confused' indicates anagramming the letters.
'moira' with letters rearranged gives 'MAORI'.
'an' acts as a link.
Can you help me to learn more?
(Other definitions for maori that I've seen before include "native people" , "Native New Zealanders" , "antipodean language" , "race" , "Member of New Zealand's aboriginal people" .)