Fierce feline (4)
I believe the answer is:
lion
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fierce feline</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 lion that I've seen before include "Buddhist scripture; Sanskrit rule" , "Large predatory feline" , "one showing unusual courage?" , "King of the forest" , "Cowardly visitor in Oz" .)