Raw joint serious hack divides (8)
I believe the answer is:
unedited
'raw' is the definition.
(I've seen this in another clue)
'joint serious hack divides' is the wordplay.
I cannot really understand how this works, but
'hack' could be 'ed' (hack can mean journalist, ed short for editor) and 'ed' is present in the answer.
'joint' could be 'united' (uniting is a kind of joining) and 'united' is found within the leftover letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for unedited that I've seen before include "Not yet prepared for publication" , "Not ready for publication" , "As written, without correction" , "as it was first presented?" , "Left as seen" .)