Assumed identity or character (7)
I believe the answer is:
persona
I believe this clue is a double definition.
'assumed identity' is the first definition.
(I've seen this before)
'character' is the second definition.
(I know that character can be written as persona)
(Other definitions for persona that I've seen before include "External aspect of character" , "One's outward character" , "No pears (anag.)" , "Role adopted by actor" , "Public image" .)