Common, crude (6)
I believe the answer is:
vulgar
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">common</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">crude</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for vulgar that I've seen before include "Coarse and common" , "Common, tasteless" , "Lacking refinement, culture or taste" , "Coarse, lacking refinement" , "Coarse and uncouth" .)