Together, as worker being dealt with (4,2,4)
I believe the answer is:
hand in hand
'together' is the definition.
(thesaurus)
'worker being dealt with' is the wordplay.
'worker' becomes 'hand' (hand is a kind of worker).
'being dealt with' becomes 'inhand' (I've seen this before).
'hand'+'inhand'='HAND IN HAND'
'as' is the link.
(Other definitions for hand in hand that I've seen before include "Give back all one's cards" , "together" , "Jointly" , "What whist players have" .)