Related Clues:

• Last word of 'America, the Beautiful'
• Large volume
• Main
• North ___
• Word with legs or air
• See 68-Across
• See 55-Down
• See 63-Down
• Kind of horse
• Captain's domain
• With 23-Down, treasure hunters
• Huge quantity
• Dig up
• World leader?
• Limitless quantity