Lariat loop (5)
I believe the answer is:
noose
'lariat loop' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for noose that I've seen before include "Loop of rope with a slipknot" , "Hangman's knot" , "Snare made of rope" , "Hanging material" , "Snare, restraint" .)