Locates visions, say (5)
I believe the answer is:
sites
'locates' is the definition.
('site' can be a synonym of 'locate')
'visions say' is the wordplay.
'visions' becomes 'sights' ('sight' can be a synonym of 'vision').
'say' indicates a 'sounds like' (homophone) clue.
'sights' is a homophone of 'SITES'.
(Other definitions for sites that I've seen before include "places" , "Is set among building locations" , "Locations or positions, as for building" , "Is set (anag)" , "Spots" .)