Related Clues:

• Nile peril
• 45-Across had one
• Venomous viper
• Cleopatra's undoing
• African cobra
• Cairo killer
• Adder relative
• Venom source
• Pharaoh's cobra
• Cleo's doom
• Cleopatra's bane
• Symbol of the Pharaohs
• Cousin of an adder
• Krait kin
• Dangerous Nile reptile