Escort person taking drugs around hospital (5)
I believe the answer is:
usher
'escort' is the definition.
(usher is a kind of escort)
'person taking drugs around hospital' is the wordplay.
'person taking drugs' becomes 'user' (I've seen this before).
'around' is an insertion indicator.
'hospital' becomes 'h'.
'user' placed around 'h' is 'USHER'.
(Other definitions for usher that I've seen before include "Guide at wedding" , "may be match participant" , "Court or parliamentary official" , "pilot" , "Show in - escort" .)