Related Clues:

• Maritime vortex
• Become sour
• Whorl
• Go time in a game
• Arnold of country
• Nelson who sang "Ah! Sweet Mystery of Life"
• Do an about-face
• Hang a right
• Kayaker's obstacle
• Change color, as leaves
• Change color, like leaves
• Marine hazard
• Spin zone?
• Water in a whirl
• Fluid dynamics phenomenon