Rule out temptation (4)
I believe the answer is:
lure
'temptation' is the definition.
(lure is a kind of temptation)
'rule out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'rule' anagrammed gives 'LURE'.
(Other definitions for lure that I've seen before include "Tempt with some kind of reward" , "Entice, bait" , "Attract with bait" , "Temptation" , "Enticement" .)