Possible Clues:

• Type of lizard in 'Sing' [E]
• Lizard kept as a pet
• Galápagos lizard
• Looking back, article in summer is initially for exotic, beastly type
• Arboreal reptile
• One South American country ejecting unknown reptile
• Galápagos lizard
• Chuckwalla's cousin
• Williams title reptile
• 'The Night of the --'