Large tropical American spiny-backed lizard (6)

I believe the answer is:

iguana

(Other definitions for iguana that I've seen before include "Could be a monitor" , "Arboreal lizard with a spiny crest" , "Large lizard found in Guiana" , "Tropical American lizard" , "Large lizard of tropical Amercia" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.