Prehistoric creature (8)
I believe the answer is:
dinosaur
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">prehistoric creature</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that dinosaur is a type of prehistoric creature)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for dinosaur that I've seen before include "Beast long gone" , "Extinct beast" , "Large extinct reptile" , "Prehistoric monster found on Darius" , "Prehistoric reptile" .)