Kings of the jungle (5)
I believe the answer is:
lions
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">kings of the jungle</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 lions that I've seen before include "Roaring cats" , "Large cats" , "Cats living in prides" , "Wild cats" , "Beastly kings" .)