Possible Clues:

• Look at a classmate's paper, say
• Deviate from Hoyle
• Constant intense pressure for dishonest person
• Steal someone's heart, say?
• Act dishonestly with that man introducing alibi in court
• Be a chiseler
• Maybe sharper children worry
• Talk about eastern swindler
• Deal from the bottom of the deck, e.g
• Not play by the rules