Lamb's mother (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lamb's mother</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ewe that I've seen before include "Palindrome for a female sheep" , "Lamb's dam" , "Farm animal" , "Directions" , "Ruminant" .)