Quietly clear off with bundle (6)
I believe the answer is:
parcel
'bundle' is the definition.
(I've seen this before)
'quietly clear off' is the wordplay.
'quietly' becomes 'p' (p for piano and quiet**).
'off' indicates anagramming the letters.
'clear' is an anagram of 'arcel'.
'p'+'arcel'='PARCEL'
'with' acts as a link.
(Other definitions for parcel that I've seen before include "Package; piece of land" , "'Bundle, package (6)'" , "One conveyed" , "Area of land" , "plot" .)