Cars in landed properties (7)
I believe the answer is:
estates
I believe this is a double definition.
'cars' is the first definition.
(estate is a type of car)
'landed properties' is the second definition.
(I've seen this in another clue)
'in' is the link.
(Other definitions for estates that I've seen before include "lands for development" , "Large cars" , "The dead leave them" , "Cars with rear doors" , "People leave them" .)