Painter's tool (6)
I believe the answer is:
roller
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">painter's tool</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for roller that I've seen before include "Revolving cylinder" , "sort of blind" , "Wave - wave-maker" , "Rotating cylinder" , "flattens lawn" .)