Possible Clues:

• Benighted in Tennessee
• Reptile, one suitable for children, in good stories
• Lizard with a long tongue
• Dewlapped lizard
• Creature with a spiny tail
• Lizard protected by Antiguan anthropologist
• Beast in a Williams play title
• Lizard with a spiny crest
• The lizard makes a gun A-one
• Galápagos Islands shore dweller