Windscreen cleaners (6)
I believe the answer is:
wipers
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">windscreen cleaners</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for wipers that I've seen before include "Ypres (WW1 sl.)" , "Cleaning devices" , "Rubber blades for cleaning car windows" , "Cleaners of windscreen" .)