Rooster (4)
I believe the answer is:
cock
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rooster</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that rooster can be written as cock)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cock that I've seen before include "Pull back a gun's hammer in readiness to shoot" , "Tilt (one's head to one's side)" , "sunshine" , "Hen's mate" , "Adult male bird" .)