Wait on minister to deliver work for Deal (5)
I believe the answer is:
serve
I believe this clue is a quintuple definition!!
'wait on' is the first definition.
(to wait on someone is to serve them)
'minister' is the second definition.
(I've seen this in another clue)
'to deliver' is the third definition.
(serving is a kind of delivering)
'work' is the fourth definition.
(serving is a kind of working)
'for deal' is the fifth definition.
(I've seen this before)
(Other definitions for serve that I've seen before include "Commence play in tennis" , "Bring food to table" , "Start a tennis match" , "Answer the purpose" , "Perform duties for" .)