Crowd disturbance, uproar (4)
I believe the answer is:
riot
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">crowd disturbance</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">uproar</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(both can mean a disturbance or commotion)</span><br/ ><br/ ></span>
(Other definitions for riot that I've seen before include "Public act of violence by an unruly mob" , "Violent disturbance by mob" , "The unruly may run this" , "unrestrained revelry" , "Civil disturbance" .)