Related Clues:

• What good singers sing in
• Lock's partner?
• *Basketball area
• "The Star-Spangled Banner" author
• Test-grading aid
• Latch follower
• A-flat, e.g
• Lock unlocker
• A cipher needs one
• Under lock and __
• Archipelago constituent, maybe
• Castaway site
• E or G, e.g
• It has all the answers
• Good thing to sing in