Slow-moving mammals (6)
I believe the answer is:
sloths
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">slow-moving mammals</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 sloths that I've seen before include "They're slow-moving and hang upside down" , "Very slow-moving creatures" , "Slow-moving animals of tropical S America" , "Slow-moving mammals" .)