Related Clues:

• Baksheesh
• Engage in a joust
• Piece of advice
• See 38-Down
• Arcade foul
• Use a lance
• Trackside offer
• Knight contest
• Good lead
• Pinball game ender
• Not stiff?
• 15 percent, often
• You can bet on it
• Diner's prerogative
• It's left behind in good restaurants