Related Clues:

• Cheat
• More acute
• More to the point?
• More astute
• Expert gambler
• More on the ball
• ... a detective who likes as much of an edge as possible?
• More tart
• Less dull
• More keen or bitter
• More keen or more bitter
• More acerbic
• Cheat at cards
• Having a better edge
• Swindler (at cards)