Noticed stud breaking carpenter's product (7)
I believe the answer is:
sawdust
'carpenter's product' is the definition.
The definition and answer can be both substances as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'noticed stud breaking' is the wordplay.
'noticed' becomes 'saw' (I've seen this in another clue).
'breaking' is an anagram indicator.
'stud' with letters rearranged gives 'dust'.
'saw'+'dust'='SAWDUST'
Can you help me to learn more?
(Other definitions for sawdust that I've seen before include "fine wooden pieces" , "Powdery wood particles" , "Powdery substance from cut wood" , "Powdery fragments from cut timber" , "Wood chippings" .)