Related Clues:

• Bit of investment advice
• Rescind
• Bit of advice
• Bill addition
• Fall (over)
• 10 percent, if you're cheap
• Pointed end
• It may be left on the table
• Reward of a sort
• Bill add-on
• Extra amount
• Broker : commission :: waitress : ___
• Inside information
• Waiter's reward
• Word to the wise