Least refined
I believe the answer is:
crudest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">least refined</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for crudest that I've seen before include "Most basic" , "extremely raw" , "Most vulgar" .)