Waste maker (5)
I believe the answer is:
'waste maker' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for haste that I've seen before include "Rash speed" , "Undue speed" , "The more of it, the less speed, it is said" , "''More . . . . ., less speed'' (5)" , "Expeditiousness" .)