Cheat with lure showing scorn (8)
I believe the answer is:
contempt
'scorn' is the definition.
(I know that scorn can be written as contempt)
'cheat with lure' is the wordplay.
'cheat' becomes 'con' (conning is a kind of cheating).
'with' means one lot of letters go next to another.
'lure' becomes 'tempt' (synonyms).
'con'+'tempt'='CONTEMPT'
'showing' acts as a link.
(Other definitions for contempt that I've seen before include "Offence of disrespect in court" , "Feeling of disdain, perhaps of court" , "Beneath this is despicable" , "The feeling of despising someone" , "Scornful feeling" .)