Furry aquatic mammal (5)
I believe the answer is:
otter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">furry aquatic mammal</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 otter that I've seen before include "Semi-aquatic mammal" , "Freshwater brown carnivore" , "Water mammal" , "Mine is made safe by this" , "Fish-eating mammal" .)