Gross; stupid (5)
I believe the answer is:
crass
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">gross</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">stupid</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for crass that I've seen before include "Tactless, boorish" , "Boorish about scars" , "Unrefined" , "Showing gross lack of sensitivity" , "Blundering" .)