Drawing instrument (6)
I believe the answer is:
pencil
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">drawing instrument</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pencil that I've seen before include "One doing boring clerical work?" , "Wooden writer" , "writing equipment" , "A writing stick" , "Writing implement with graphite centre" .)