Locate quote in audition (4)
I believe the answer is:
site
'locate' is the definition.
('site' can be a synonym of 'locate')
'quote in audition' is the wordplay.
'quote' becomes 'cite' ('cite' can be a synonym of 'quote').
'in audition' shows a homophone (sound like) (audition can mean hearing).
'cite' is a homophone of 'SITE'.
(Other definitions for site that I've seen before include "Locale" , "Locate, position" , "Whereabouts" , "Somewhere to build, perhaps" , "Where something is located" .)