Young cat (6)
I believe the answer is:
kitten
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">young cat</span>' is the definition.<br/ ><span class="explanation-format__explanation">(a kitten is a young cat)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for kitten that I've seen before include "Immature cat" , "one to become queen?" , "Little mewing ball of fur?" , "Mini-mog?" , "Little feline" .)