Wrangler's rope (6)
I believe the answer is:
lariat
'wrangler's rope' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lariat that I've seen before include "Rope with running loop at one end" , "Rope used as a lasso" , "Long narrow ditch" , "Long noosed rope used to catch animals" , "Long rope with a noose at the end" .)