Eagles' nests (6)
I believe the answer is:
eyries
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">eagles' nests</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for eyries that I've seen before include "Lofty nest of birds of prey" , "Lofty nests of a bird of prey" , "Lofty nests of birds of prey" , "Lofty nests for eagles" , "Eagle's nest" .)