Related Clues:

• Missouri, e.g.
• Hudson, e.g.
• Snake, for one
• Water under the bridge
• Tributary
• See 32-Across
• Banks hold it
• Tombigbee or Pee Dee
• See 27-Down
• Snake, e.g.
• Mancini's ''Moon ---''
• Natural boundary
• Colorado or Missouri
• Stream
• Watercourse