Terrible place in the shade, possibly (5)
I believe the answer is:
hades
'terrible place' is the definition.
'shade possibly' is the wordplay.
'possibly' indicates an anagram.
'shade' is an anagram of 'HADES'.
'in the' acts as a link.
(Other definitions for hades that I've seen before include "Classic hell in the shade" , "Greek god of the underworld" , "In Greek myth, the Underworld" , "Pluto" , "Underworld, hell" .)