Such a location makes sound sense (4)
I believe the answer is:
site
'such a location' is the definition.
(site is a kind of location)
'sound sense' is the wordplay.
'sound' shows a homophone (sound like).
'sense' becomes 'sight' (sighting is a kind of sensing).
'sight' is a homophone of 'SITE'.
'makes' acts as a link.
(Other definitions for site that I've seen before include "Web location; place" , "Designated place" , "Locale" , "Position for the building sounds visual" , "Building land" .)