Risk torment or halt marriage arrangements (9)
I believe the answer is:
'risk torment or halt marriage arrangements' is the definition.
I can't tell whether this defines the answer.
'risk torment or halt' is the wordplay.
'risk' becomes 'bet' (I've seen this in another clue).
'torment' indicates an anagram (I've seen 'tormented' mean this).
'orhalt' anagrammed gives 'rothal'.
Can you help me to learn more?
(Other definitions for betrothal that I've seen before include "Promise of marriage" , "Commitment" , "Plight" , "Engagement to marry" , "Pledge" .)