The yoke's on them (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">the yoke's on them</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 oxen that I've seen before include "Steers" , "Domestic bovines" , "Domesticated bovine draft animals" , "Horned farm animals" , "Doctored bulls" .)