Guide employer around hospital (5)
I believe the answer is:
usher
'guide' is the definition.
(ushering is a kind of guiding)
'employer around hospital' is the wordplay.
'employer' becomes 'user' (I've seen this before).
'around' means one lot of letters goes inside another.
'hospital' becomes 'h'.
'user' enclosing 'h' is 'USHER'.
(Other definitions for usher that I've seen before include "Theatre attendant" , "Helper at wedding" , "Cinema or wedding official" , "Person showing one to a seat" , "Introduce" .)