Hoot and a half (4)
I believe the answer is:
riot
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">hoot and a half</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 riot that I've seen before include "Wild revelry" , "A wild public affray" , "Uprising" , "Violent crowd disturbance" , "Affray, fighting in the streets" .)