Born as (3)
I believe the answer is:
nee
'born as' is the definition.
(nee is used to show someone's birth name)
This is the entire clue.
(Other definitions for nee that I've seen before include "Originally called" , "Name originally" , "Adjective denoting woman's name before marriage" , "Prefix denoting woman's name before marriage" , "called before wedding?" .)