Moira goes native (5)
I believe the answer is:
maori
'native' is the definition.
(I've seen this before)
'moira goes' is the wordplay.
'goes' is an anagram indicator (I've seen 'went' mean this ('go' can mean move)).
'moira' is an anagram of 'MAORI'.
(Other definitions for maori that I've seen before include "aboriginal inhabitant" , "Polynesian aborigine" , "native person" , "Indigenous New Zealanders" , "I roam (anag)" .)