In audition, refer to setting (4)
I believe the answer is:
site
'setting' is the definition.
(synonyms)
'in audition refer to' is the wordplay.
'in audition' shows a homophone (sound like) (audition can mean hearing).
'refer to' becomes 'cite' (synonyms).
'cite' sounds like 'SITE'.
(Other definitions for site that I've seen before include "Where something is located" , "Somewhere to build, perhaps" , "Locate - place" , "Position for the building sounds visual" , "Web location; place" .)