Runs riot (8)
I believe the answer is:
rampages
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">runs riot</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rampages that I've seen before include "Moves through a place in a violent and uncontrollable way" , "Violent and destructive behaviours" , "Runs riot" , "Violent disorders" , "Rushes around wildly" .)