Crossword Genius

Part of an unruly mob

Ross

I believe the answer is:

rioter

(Other definitions for rioter that I've seen before include "One engaged in a violent disturbance of the peace" , "Person engaged in disorder" , "revolting person" , "One of a violent crowd" , "He runs amok in public" .)

I've seen this clue in The New York Times.
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