Polishing agent (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">polishing agent</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 emery that I've seen before include "Dick - - , late comedian" , "Rock used as abrasive" , "Hard, grey-black mineral used as 11 down" , "Hard grey-black mineral used as an abrasive" , "Abrasive powder" .)
(Other definitions for pumice that I've seen before include "Porous lava" , "Volcanic-rock scourer" , "Piece of volcanic rock used as an abrasive" , "Light, porous volcanic rock" , "Volcanic stone used as abrasive" .)