Possible Clues:

• Certain artist's forte
• Trap for a pigeon
• Penniless rascal's a cheat
• Swindle rascal detailed
• Bernie Madoff's hedge fund, e.g.
• Swindle detected in Cameron’s campaign
• Fraudulent scheme of rascal cut short
• Phishing lure?
• Nigerian email, say, computers returned
• Something fraudulent in this campaign