Quietly leave the podium in disapproval (5)
I believe the answer is:
odium
'disapproval' is the definition.
'quietly leave the podium' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet).
'leave' suggests deleting specific letters.
'podium' with 'p' taken away is 'ODIUM'.
'in' acts as a link.
(Other definitions for odium that I've seen before include "Hate coupled with disgust" , "Great hatred." , "Widespread hatred or disgust felt towards someone" , "Widespread dislike and contempt" , "that would cause disgust" .)