Related Clues:

• Blue hue
• Sovereign
• See 54-Across
• Place for a plane
• Hydrophane or isopyre
• See 5-Down
• Christie's 'Death on the ___'
• Shade of white
• Egypt's main water supply
• Aswan Dam locale
• Hit high into the air
• Bank-washer in Cairo
• 'Cleopatra' backdrop
• October's birthstone
• Rosetta's river