Work for a deal (5)
I believe the answer is:
serve
This clue is a double definition.
'work for' is the first definition.
(I've seen this in another clue)
'a deal' is the second definition.
(I've seen this before)
(Other definitions for serve that I've seen before include "Milton 'They also . . . . . who only stand and wait'" , "commence action in court before judges?" , "Start (tennis game)" , "Act as waiter" , "Begin a tennis game" .)