Violent change or disruption (8)
I believe the answer is:
upheaval
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">violent change</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">disruption</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for upheaval that I've seen before include "Disturbance or turmoil" , "Great disruptive change" , "Violent or sudden change or disruption" , "Disorder, turmoil" , "Turbulence" .)