Possible Clues:

• Eg, Grand Union
• One may be said to have a way with water
• Water-course where a trainee has to follow vessel
• Suez, e.g
• eg Grand Union
• Able to start a half-century for the way of the water for the dugout?
• Is a half-century able to be so watery?
• Able to be a half-century, by way of water
• See 11-Down
• For one Sue is sound