Schism (5)
I believe the answer is:
split
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">schism</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that schism can be written as split)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for split that I've seen before include "Discontinue a relationship" , "Divide; leave suddenly" , "Divide - Croatian port" , "Go separate ways" , "Cleave or break up" .)