Disapproval results from quietly leaving stage (5)
I believe the answer is:
odium
'disapproval' is the definition.
'quietly leaving stage' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'leaving' indicates named letters should be taken away.
'stage' becomes 'podium' (a podium is a stage or platform).
'podium' with 'p' removed is 'ODIUM'.
'results from' is the link.
(Other definitions for odium that I've seen before include "Hatred, repugnance" , "Hate coupled with disgust" , "Widespread hatred or disgust felt towards someone" , "Offensiveness" , "that would cause disgust" .)