Manual taken out after confusion finally divides us (9)
I believe the answer is:
unskilled
'manual' is the definition.
(as in manual work or unskilled labour)
'taken out after confusion finally divides us' is the wordplay.
'taken out' becomes 'killed' (killing is a kind of taking out).
'after' means one lot of letters go next to another.
'finally' indicates one should take the final letters.
'divides' is an insertion indicator.
The last letter of 'confusion' is 'n'.
'n' put inside 'us' is 'uns'.
'killed' put after 'uns' is 'UNSKILLED'.
(Other definitions for unskilled that I've seen before include "Requiring no special training" , "Lacking professional expertise" , "Inexperienced" , "needing training" , "Incompetent" .)