Long noosed rope used to catch animals (6)
I believe the answer is:
lariat
'long noosed rope used to catch animals' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lariat that I've seen before include "A cowboy's rope with noose" , "Line of cowboy" , "Cowboy's rope (of Spanish origin)" , "Long narrow ditch" , "Cattle-catching rope" .)