Belonging to that thing (3)
I believe the answer is:
its
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">belonging to that thing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for its that I've seen before include "The thing's" , "Belonging to a particular thing" , "Another form of 'tis" , "Belonging to something nonhuman" , "Sit (anag.)" .)