Girl from Oregon or Maine (5)
I believe the answer is:
norma
'girl' is the definition.
'from oregon or maine' is the wordplay.
'from' indicates a hidden word.
'NORMA' is hidden within 'oregon or maine'.
(Other definitions for norma that I've seen before include "John Major's wife - Bellini opera" , "- - Jean Baker: Marilyn Monroe" , "Operatic heroine" , "Outdoor function" , "Opera - ex-PM's wife" .)