Utter confusion (5)
I believe the answer is:
chaos
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">utter confusion</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 chaos that I've seen before include "Pandemonium" , "Absence of order" , "Anarchy" , "upheaval" , "confused state" .)