Plasterer's tool (6)
I believe the answer is:
trowel
'plasterer's tool' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for trowel that I've seen before include "Garden implement" , "Hand tool for plasterers or gardeners" , "Platsterer's tool" , "Digging tool" , "Hand tool for scooping or spreading" .)