He leads us to her (5)
I believe the answer is:
usher
'he leads' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'us to her' is the wordplay.
'us'+'her'='USHER'
Can you help me to learn more?
(Other definitions for usher that I've seen before include "Doorkeeper; shower to seat" , "Helper at wedding" , "Theatre attendant" , "Doorkeeper in parliament or 29 down" , "Theatre guide" .)