Hospital department initially restricting your access (5)
I believe the answer is:
entry
'access' is the definition.
(entry is a kind of access)
'hospital department initially restricting your' is the wordplay.
'hospital department' becomes 'ent'.
'initially' suggests taking the first letters.
The initial letters of 'restricting your' is 'ry'.
'ent'+'ry'='ENTRY'
(Other definitions for entry that I've seen before include "vestibule" , "Lobby" , "Ingress, portal" , "One in competition" , "field" .)