Related Clues:

• Indian, e.g.
• The Kara Sea is on its north
• Area east of the Bosporus
• Vastness
• The briny
• ___ monster
• Water source
• Source of much West Coast trade
• Abundance
• See 25-Across
• Three oceans touch it
• Large amount
• Continental divide?
• Where the buoys are
• See 6-Down