An uninteresting place to live? (4)
I believe the answer is:
flat
I believe this is a double definition.
'an uninteresting' is the first definition.
(thesaurus)
'place to live?' is the second definition.
(a flat or apartment is a kind of residence)
(Other definitions for flat that I've seen before include "Quarters - punctured - smooth" , "Apartment - below the note" , "Horizontal" , "Dull; apartment" , "Pressing implement" .)