Assumed identity or character (7)
I believe the answer is:
persona
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">assumed identity</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">character</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that character can be written as persona)</span><br/ ><br/ ></span>
(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" .)