Related Clues:

• Egypt's main water supply
• Aswan Dam locale
• Hit high into the air
• Bank-washer in Cairo
• Swell treatment
• 'Cleopatra' backdrop
• See 39-Across
• Hard rain?
• Rosetta's river
• Cataract site
• Business suit shade
• Clinch, as a deal
• Sew up
• Vanilla ___
• Site of annual floods