Confused mass (6)
I believe the answer is:
tangle
'confused mass' is the definition.
(I've seen this before)
This is all the clue.
(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" .)