Large lizard (6)
'large lizard' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for iguana that I've seen before include "Large lizard found in Guiana" , "Herbivore" , "Tropical spiny lizard" , "Creature" , "Could be a monitor" .)
'large lizard' is the definition.
(monitor is a type of lizard)
This is all the clue.
(Other definitions for monitor that I've seen before include "Keep tabs on; lizard" , "Keep track of" , "Display device" , "Person or device for observing and checking" , "Large lizard; TV screen" .)