Devil's domain (5)
I believe the answer is:
hades
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">devil's domain</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 hades that I've seen before include "Mythological abode of the dead" , "It's classical hell in the shade" , "Greek underworld with spirits of the dead" , "A place of some darkness" , "Home of the souls of the dead" .)