Cock (7)
I believe the answer is:
rooster
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cock</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that cock can be written as rooster)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for rooster that I've seen before include "One may crow" , "Farmyard cock" , "So retro (anag.)" , "one going to sleep" , "Male hen" .)