More primitive (5)
I believe the answer is:
ruder
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">more primitive</span>' is the definition.<br/ ><span class="explanation-format__explanation">('rude' can be a synonym of 'primitive')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ruder that I've seen before include "less pleasant in manner" , "Less mannerly" , "More impudent" , "comparatively unsophisticated" , "Coarser" .)