Gallows loop (5)
I believe the answer is:
noose
'gallows loop' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for noose that I've seen before include "Loop of rope with a slipknot" , "Looped rope" , "form of punishment" , "Ring of rope" , "Hangman's equipment" .)