Fool breaks wind during link (8)
I believe the answer is:
hoodwink
'fool' is the definition.
(I know that hoodwink is a more specific form of the action betray)
'breaks wind during link' is the wordplay.
'breaks' indicates anagramming the letters.
'during' indicates putting letters inside.
'link' becomes 'hook' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'wind' with letters rearranged gives 'dwin'.
'dwin' going inside 'hook' is 'HOODWINK'.
Can you help me to learn more?
(Other definitions for hoodwink that I've seen before include "Deceive - cheat" , "Dupe, bamboozle" , "Deceive, trick" , "Mislead" , "Con" .)