Present her with a key (4)
I believe the answer is:
here
'present' is the definition.
('here' can be similar in meaning to 'present')
'her with a key' is the wordplay.
'with' is a charade indicator (letters next to each other).
'a key' becomes 'e' (I've seen this in other clues**).
'her'+'e'='HERE'
(Other definitions for here that I've seen before include "Present; I say!" , "Hither" , ""___ be dragons" (old map inscription?)" , "At this stage" , "final clue?" .)