Wax pencil (6)
I believe the answer is:
crayon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wax pencil</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 crayon that I've seen before include "drawer" , "Coloured wax pencil" , "Drawing-stick" , "Colouring pencil" , "Writer" .)