Confused mass (6)
I believe the answer is:
tangle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">confused mass</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tangle that I've seen before include "Twist together; seaweed" , "Get involved" , "Twist into a confused mass, say wool" , "Twist, snarl, knot" , "Trap < tall guy from Perth" .)