Picked out clean, cutting-edge product (7)
I believe the answer is:
sawdust
'cutting-edge product' is the definition.
(sawdust is produced by a tool with a sharp edge)
'picked out clean' is the wordplay.
'picked out' becomes 'saw' (pick out can mean to notice or see).
'clean' becomes 'dust' (dust can mean to clean up dust).
'saw'+'dust'='SAWDUST'
(Other definitions for sawdust that I've seen before include "remains in the workshop" , "Powdered wood" , "result of use of blade" , "Result of cutting wood" , "Carpenter's waste matter" .)