Bison (7)
I believe the answer is:
buffalo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bison</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that buffalo is a type of bison)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for buffalo that I've seen before include "-- Bill, showman" , "Wild ox or bison" , "Powerful steer" , "US city" , "Large animal of the cattle family" .)