Arboreal lizards (7)
I believe the answer is:
iguanas
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">arboreal lizards</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for iguanas that I've seen before include "Asia gun (anag.)" , "American arboreal lizards" , "Large lizards" , "tropical natives" , "beasts" .)