Crossword setters and our boss getting employed (4)
I believe the answer is:
used
'employed' is the definition.
('use' can be a synonym of 'employ')
'crossword setters and our boss' is the wordplay.
'crossword setters' becomes 'us' (the crossword setter and their colleagues).
'and' is a charade indicator (letters next to each other).
'our boss' becomes 'ed' (editor, the crossword setter's boss).
'us'+'ed'='USED'
'getting' acts as a link.
(Other definitions for used that I've seen before include "Second hand" , "Subject to exploitation" , "Of clothes or cars, second-hand" , "That's not new" , "Brought into play" .)