Appoint and employ nurses together (2,6)
I believe the answer is:
in tandem
'together' is the definition.
(working in tandem is working together)
'appoint and employ nurses' is the wordplay.
'nurses' indicates a hidden word (nurse can mean holding closely).
'IN TANDEM' is hidden within 'appoint and employ'.
(Other definitions for in tandem that I've seen before include "'One behind the other, as on a bicycle (2,6)'" , "One behind the other or alongside" , "Working together" , "Together (as a pair)" , "Together - as on a bicycle made for two" .)