The most common and most likely answer to this crossword clue is the 8 letter word JOBSHARE
I've seen this crossword clue in The Guardian
J
O
B
S
H
A
R
E
More clues leading to the result JOBSHARE
Buddy explains!
The straight part
We know that "not all my own work" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case not all my own work = jobshare.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does JOBSHARE mean?
JOBSHARE noun- A work arrangement where the functions of a single job are fulfilled by two or more people who work at different times.