Retreats
I believe the answer is:
dens
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">retreats</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for dens that I've seen before include "Lairs" , "Man's" , "Habitations of wild animals" , "Habitats of some wild animals" , "Studies" .)