Crude, uncouth (6)
I believe the answer is:
vulgar
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">crude</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that crude can be written as vulgar)</span><br/ ><br/ >'<span class="explanation-format__original">uncouth</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that uncouth can be written as vulgar)</span><br/ ><br/ ></span>
(Other definitions for vulgar that I've seen before include "Coarse, boorish" , "Indecent" , "Rude and coarse" , "Unrefined" , "Improper - fractions may be so described" .)