Male elephant (4)
I believe the answer is:
bull
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">male elephant</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 bull that I've seen before include "Cow's mate" , "Male bovine - target's centre" , "Large quadruped" , "Animal on target?" , "Papal document; farm animal" .)