Snare pointless — change of heart required (5)

I believe the answer is:

noose

'snare' is the definition.
(I know that snare can be written as noose)

I don't understand the rest of the clue.

(Other definitions for noose that I've seen before include "it could endanger your life" , "Loop in a lariat" , "Loop - snare" , "Loop with running knot" , "Hangman's halter" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app