Breathtaking feature, including old hangman's loop (5)
I believe the answer is:
noose
'hangman's loop' is the definition.
(I've seen this in another clue)
'breathtaking feature including old' is the wordplay.
I cannot really understand how this works, but
'old' could be 'o' (abbreviation) and 'o' is found in the answer.
'feature' could be 'nose' (I've seen this before) and 'nose' is located in the leftover letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for noose that I've seen before include "Hangman's running loop" , "Hangman's knot" , "Loop of rope with a slipknot" , "Hanging material" , "Hangman's or cowboy's loop" .)