Rule out a draw (4)
I believe the answer is:
lure
'a draw' is the definition.
(I've seen this in other clues)
'rule out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'rule' is an anagram of 'LURE'.
(Other definitions for lure that I've seen before include "'Entice, tempt (4)'" , "Tempt invoking rule" , "Temptation" , "Tempt with some kind of reward" , "Attract with bait" .)