Related Clues:

• 100 percent
• Perform very well
• Alternative to nothing
• Get through to
• Bold competitor
• Last word in the Pledge of Allegiance
• It's this or nothing!
• Do a great job
• When purchased alone
• Respectively
• With 43-Across, sane
• "--- That Jazz"
• Word on a price tag
• One hundred percent
• See 90-Across