Miss Wood or King Cole, mostly alien (7)
I believe the answer is:
natalie
'miss wood' is the definition.
(I've seen this in another clue)
'king cole mostly alien' is the wordplay.
'king cole' becomes 'nat' (I've seen this before).
'mostly' means to remove the last letter (most but not all of the word).
'alien' with its final letter taken off is 'alie'.
'nat'+'alie'='NATALIE'
'or' acts as a link.
(Other definitions for natalie that I've seen before include "girl" , "female name" , "Girl's name" , "Wood perhaps" .)