Playful aquatic animal (5)
I believe the answer is:
otter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">playful aquatic animal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for otter that I've seen before include "Aquatic beast" , "Water creature" , "Freshwater carnivorous mammal with webbed and clawed feet" , "fish-eater displayed" , "river in Honiton" .)