Coarser (6)
I believe the answer is:
cruder
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">coarser</span>' is the definition.<br/ ><span class="explanation-format__explanation">('crude' can be a synonym of 'coarse')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cruder that I've seen before include "Less refined, more vulgar" , "Less refined, more primitive" .)