Dwelling away from others, intended to leave area (9)
I believe the answer is:
apartment
'dwelling' is the definition.
(apartment is a type of dwelling)
'away from others intended to leave area' is the wordplay.
'away from others' becomes 'apart' (kept apart).
'intended' becomes 'meant' (to mean something is to intend it).
'to leave' indicates named letters should be taken away.
'area' becomes 'a' (maths abbreviation).
'meant' with 'a' taken away is 'ment'.
'apart'+'ment'='APARTMENT'
(Other definitions for apartment that I've seen before include "place to live" , "Room ? flat" , "Set of rooms or American flat" , "Flat (mainly US)" , "Penthouse" .)