Tempted to break a rule to a good end (5)
I believe the answer is:
lured
'tempted' is the definition.
('lure' can be a synonym of 'tempt')
'break a rule to a good end' is the wordplay.
'break' indicates an anagram.
'to' is a charade indicator (letters next to each other).
'end' indicates one should take the final letters.
The last letter of 'good' is 'd'.
'rule' with letters rearranged gives 'lure'.
'lure'+'d'='LURED'
'to' is the link.
(Other definitions for lured that I've seen before include "was enticing" , "Tempted or enticed" , "Attracted" , "Seduced" .)