Related Clues:

• Bird beak
• Boating mishap
• Extremity
• La gniappe
• Leave a little extra
• It may be 20%
• Baksheesh
• Business end of a pen
• Piece of advice
• See 38-Down
• Trackside offer
• Pencil part
• Good lead
• Not stiff?
• 15 percent, often