Uncle’s wife (4)
I believe the answer is:
aunt
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">uncle's wife</span>' is the definition.<br/ ><span class="explanation-format__explanation">(your uncle's wife would be an aunt)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for aunt that I've seen before include "Wife of one's uncle" , "Female relation" , "Put up with" , "Charley's in play?" , "Tuna gone bad for the relative" .)