Related Clues:

• It keeps on rolling
• Lawyers charge
• One of a semi's eighteen
• Clinic cost
• See 66-Across
• Drain the energy from
• Bicycle part
• Start to sag
• Licensing charge
• Ersatz swing
• Word with doctor's or greens
• Contest requirement
• Part of a makeshift swing, perhaps
• Cover charge, e.g.
• Payment for services