One producing pieces from organic bin missing tons (8)
I believe the answer is:
composer
'one producing pieces' is the definition.
(someone producing pieces of music)
'organic bin missing tons' is the wordplay.
'organic bin' becomes 'composter' (receptacle which produces compost).
'missing' suggests deleting specific letters.
'tons' becomes 't'.
'composter' with 't' taken away is 'COMPOSER'.
'from' acts as a link.
(Other definitions for composer that I've seen before include "Eg, Arne, Bach, Chopin" , "Wagner perhaps" , "he makes notes" , "eg Ravel" , "Person who writes music" .)