Public ruckus (4)
I believe the answer is:
riot
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">public ruckus</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for riot that I've seen before include "Civil disturbance" , "Rowdy behaviour" , "Civil disorder" , "Ruckus, insurrection" , "A wild public affray" .)