Moggy, kitty (4)
I believe the answer is:
puss
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">moggy</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that puss is a type of moggy)</span><br/ ><br/ >'<span class="explanation-format__original">kitty</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I know that kitty can be written as puss)</span><br/ ><br/ ></span>
(Other definitions for puss that I've seen before include "Cat (abbr)" , "For example, a Persian" , "Cat (informal)" , "Booted panto character" , "Feline" .)