Related Clues:

• Retainer, e.g.
• Electrician's charge
• Extra charge
• It may be added to the bill
• See 65-Down
• Attorney's concern, among other things
• Bit of investment advice
• Cost of doing business
• Buyer's add-on
• Cabbage forked over
• Repair bill part
• Common add-on
• Bit of advice
• Addition
• Uncle Sam's take