Relaxation room (3)
I believe the answer is:
den
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">relaxation room</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for den that I've seen before include "Habitation of wild animals (3)" , "Animal habitation" , "Animal's lair or gent's study" , "Animal's home or gent's study" , "Miserable place" .)