Related Clues:

• Sailor's septet
• Conclusion of "America the Beautiful"
• Coral or Sargasso
• Coral, for one
• Ross, for one
• Famous septet
• Shark's place
• With 23-Across, Neptune, e.g.
• Geographical septet
• Davy Jones' locker
• Irish or Baltic, e.g.
• Whale's home
• North or South China
• Cartographer's septet
• Liner's milieu