Dreary accommodation (4)
I believe the answer is:
flat
I believe this is a double definition.
'dreary' is the first definition.
(thesaurus)
'accommodation' is the second definition.
(thesaurus)
(Other definitions for flat that I've seen before include "Like a pancake?" , "without qualification" , "with no relief" , "Digs perhaps" , "Unnatural - uninteresting - apartment" .)