Everglades denizen (9)
I believe the answer is:
alligator
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">everglades denizen</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 alligator that I've seen before include "Large carnivorous reptile" , "Predatory cold-blooded killer" , "Cold-blooded killer, maybe" , "From fearsome beast" , "Dangerous creature" .)