Related Clues:

• 21-Across, e.g.
• Prefix with mate or graph
• Rock music subgenre
• Word on U.S. currency
• Component
• Prayer recipient
• It can be in a jam
• Showroom display
• Self-starter?
• Pantheon member
• Mobile leader
• Type of insurance
• Jaguar, for one
• Aurora or Saturn
• Conductive substance