Schismatic (8)
I believe the answer is:
divisive
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">schismatic</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for divisive that I've seen before include "Tending to create dissension" , "Tending to cause disagreement within a group - in arithmetic way?" , "Tending to cause conflict" , "Causing disagreement" , "Troublesome" .)