It's all wound up (4)
I believe the answer is:
coil
'it's all wound up' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for coil that I've seen before include "Series of concentric circles" , "Curl, loop" , "Wind round and round in loops" , "Helix" , "Curl, spiral" .)