Sound of organ I installed (5)
I believe the answer is:
noise
'sound' is the definition.
(noise is a kind of sound)
'organ i installed' is the wordplay.
'organ' becomes 'nose' (nose is a kind of organ**).
'installed' is an insertion indicator.
'nose' going around 'i' is 'NOISE'.
'of' is the link.
(Other definitions for noise that I've seen before include "Unstructured sound" , "Hum" , "Unwelcome sound" , "Hubbub" , "Uproar" .)