Present her with key (4)
I believe the answer is:
here
'present' is the definition.
('here' can be similar in meaning to 'present')
'her with key' is the wordplay.
'with' means one lot of letters go next to another.
'key' becomes 'e' (I've seen this in other clues**).
'her'+'e'='HERE'
(Other definitions for here that I've seen before include "In this place - present" , "At this stage" , "Present; I say!" , "Present - at this point" , "final clue?" .)