Carpet cleaner (7)
I believe the answer is:
shampoo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">carpet cleaner</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 shampoo that I've seen before include "treat shock?" , "Hair lotion" , "Cleaner for locks" , "Hair wash preparation" , "Would Mao shop for this cleaner?" .)