Riotous crowd (3)
I believe the answer is:
mob
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">riotous crowd</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for mob that I've seen before include "Horde" , "Crime syndicate or disorderly crowd" , "Rowdy crowd" , "Crowd round" , "Unruly lot" .)