Property contains needless empty passage (7)
I believe the answer is:
transit
'passage' is the definition.
(I know that passage can be written as transit)
'property contains needless empty' is the wordplay.
'property' becomes 'trait' (both can mean a quality or feature).
'contains' indicates putting letters inside.
'empty' suggests removing the centre.
'needless' with its middle removed is 'ns'.
'trait' placed around 'ns' is 'TRANSIT'.
(Other definitions for transit that I've seen before include "Conveyance of goods or people - tin star (anag)" , "The act of carrying from one place to another" , "The carrying of people etc" , "Pass across/through" , "The process of going or conveying" .)