Accustomed to being employed (4)
I believe the answer is:
used
I believe this clue is a double definition.
'accustomed' is the first definition.
(I've seen this in another clue)
'being employed' is the second definition.
(I've seen this before)
'to' acts as a link.
(Other definitions for used that I've seen before include "Sued, having been employed" , "Enjoyed" , "Sued (anag.)" , "not got directly" , "taken advantage of!" .)