Related Clues:

• "Survivor" locale, maybe
• Offshore ridge
• It's a great barrier
• It's surrounded by beaches
• Emerald, for one
• Nautical hazard
• Chain part
• Gilligan's home
• Maroon's locale, perhaps
• Spot on the map
• Archipelago component
• Small land mass
• Ireland, the Emerald ___
• Place for 21-Down
• Ocean occupant