Bear's lairs (4)
I believe the answer is:
dens
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bears' lairs</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 "Man's" , "Lairs" , "Habitats of some wild animals" , "Studies" , "Habitations of wild animals" .)