The Bull (6)
I believe the answer is:
taurus
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the bull</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for taurus that I've seen before include "Sign of the Bull from 12 across" , "A group of stars" , "April/May sign" , "Mountains in 8 across" , "Bull constellation" .)