Young hen (6)
I believe the answer is:
pullet
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">young hen</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 pullet that I've seen before include "Chicken under one year old" , "Young domestic fowl" , "Young chicken" , "Domestic hen less than 1 year old" , "A young domestic hen less than one year old" .)