Related Clues:

• Has an ace up one's sleeve, say
• They're not who they pretend to be
• Looks at the answers beforehand, e.g.
• Fraudulent ones
• False fronts
• Flouts the rules
• Feathered talker
• Con games
• Pretences
• Knocks (off)
• Speaks ill of
• Is scathing toward
• Fabric flaws
• Rooks
• Steals, with 'off'