Peeresses (10)
I believe the answer is:
noblewomen
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">peeresses</span>' is the definition.<br/ ><span class="explanation-format__explanation">('noblewoman' can be a synonym of 'peeress')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for noblewomen that I've seen before include "Aristocrats" , "ladies" , "some of the aristocracy" , "Peeresses" .)