Shine; language (6)
I believe the answer is:
polish
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">shine</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that shine can be written as polish)</span><br/ ><br/ >'<span class="explanation-format__original">language</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(Polish is a language)</span><br/ ><br/ ></span>
(Other definitions for polish that I've seen before include "class" , "Shine with soft cloth, say silverware" , "Rub - European" , "Smooth or shine by rubbing" , "Rub to make the surface shine" .)