Colour-changing lizard (9)
I believe the answer is:
chameleon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">colour-changing lizard</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for chameleon that I've seen before include "Lizard whose skin changes colour" , "Someone who changes position to suit the situation" , "Colour-changing lizard" , "Lizard able to change its skin colour" , "Animal that changes colour" .)