Partners getting into property conveyance (7)
I believe the answer is:
transit
'conveyance' is the definition.
(I've seen this before)
'partners getting into property' is the wordplay.
'partners' becomes 'ns' (North and South are partners in the game bridge).
'getting into' means one lot of letters goes inside another.
'property' becomes 'trait' (both can mean a quality or feature).
'ns' placed into 'trait' is 'TRANSIT'.
(Other definitions for transit that I've seen before include "Travel" , "Moving" , "Passage of planet across the disc of the sun" , "Change" , "Haulage" .)