Household pet (3)
I believe the answer is:
cat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">household pet</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cat that I've seen before include "Carnivore; whip" , "Feline mammel" , "Animal (domesticated or wild)" , "Sailor's whip with nine knotted strands" , "one's pyjamas? They're an excellent thing" .)