Related Clues:

• Grand Canyon part
• Triton's milieu
• The Atlantic, e.g
• Sponge spot
• Outer margin
• Pacific, perhaps
• Edge one into a little room
• Giant squid's home
• "... sailed the ___ blue"
• Expanse with crests
• Not quite make the putt, with 'out'
• Wheel's edge
• Pacific or Atlantic
• Volcanic edge
• Divider of continents