Hospital department's purchasing Queen records (6)
I believe the answer is:
enters
'records' is the definition.
(enter can mean to enter into a record)
'hospital department's purchasing queen' is the wordplay.
'hospital department's' becomes 'ENT's' (abbreviation for Ear, Nose and Throat department).
'purchasing' indicates putting letters inside (some letters take possession of others).
'queen' becomes 'ER' (abbreviation for Elizabeth Regina).
'ents' placed around 'er' is 'ENTERS'.
(Other definitions for enters that I've seen before include "Inserts" , "Comes in" , "Records, in a diary say" , "Goes inside" , "Goes in or records in book" .)