Waste time as a craftsman (6)
I believe the answer is:
potter
I believe this clue is a double definition.
'waste time' is the first definition.
(I've seen this before)
'a craftsman' is the second definition.
(potter is a kind of craftsman)
'as' is the link.
(Other definitions for potter that I've seen before include "Producer of earthenware - move with little direction or energy" , "Hogwarts' Harry" , "Dabble; dawdle" , "at the wheel?" , "Maker of earthenware dishes" .)