Hangman's ropes (6)
I believe the answer is:
nooses
'hangman's ropes' is the definition.
('noose' can be a synonym of 'hangman's rope')
This is all the clue.
(Other definitions for nooses that I've seen before include "Loops in lariats" , "Loops for the hangman" , "Running loops" , "Rope loops with tightening knots" , "Loops in cowboy ropes" .)