Related Clues:

• 15 percent, often
• Bathtub mishap
• You can bet on it
• Diner's prerogative
• It's left behind in good restaurants
• It's awful when pink
• Place to dock
• Kind of knot or cover
• Line on a bill
• Trackside advice
• Minor mistake
• Freudian ___
• Visible part of an iceberg
• Something helpful
• Go (out) quietly