Listeners' disapproval in ancient theatre (5)
I believe the answer is:
odeum
'ancient theatre' is the definition.
(theatre in classical times)
'listeners' disapproval' is the wordplay.
'listeners'' shows a homophone (sound like).
'disapproval' becomes 'odium'.
'odium' is a homophone of 'ODEUM'.
'in' acts as a link.
(Other definitions for odeum that I've seen before include "Roman theatre" , "concert hall" , "place of performing music" , "Greek building for music" , "theatre in Athens?" .)