Very large mammal (8)
I believe the answer is:
elephant
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">very large mammal</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 elephant that I've seen before include "it's said to have lots of memory" , "Pachyderm hunted for ivory" , "Jumbo" , "Large land mammal" , "The plane (anag.)" .)