Related Clues:

• 'Yes, ___!'
• Base address
• Round Table address
• Trenton's river
• 'Mister!'
• Blue flag, e.g.
• Colored part of a ball?
• Word said with a salute
• Title for 17-Across
• Rainbow
• Garden beauty
• Pupil's locale
• Pupil surrounder
• See 21-Across
• Respectful title