Level with First Lady (3)
I believe the answer is:
eve
'first lady' is the definition.
(Biblical first woman)
'level with' is the wordplay.
'with' indicates a hidden word.
'EVE' is hidden in the letters of 'level'.
(Other definitions for eve that I've seen before include "Previous day" , "First lady from the night before" , "Adam's partner" , "Later in the day, in short" , "Adam's wife" .)