Home audio system (6)
I believe the answer is:
stereo
'home audio system' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stereo that I've seen before include "Music-playing equipment giving depth of sound" , "Sound transmission through two or more speakers" , "Three dimensional sound effect" , "Of sound equipment, having two speakers" , "System of sound reproduction" .)