Badger’s burrow (4)

I believe the answer is:
sett
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">badger's burrow</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 sett that I've seen before include "Badgers' lair" , "Test for a badger's burrow" , "Retreat" , "habitat" , "Badger's residence" .)