The most common and most likely answer to this crossword clue is the 8 letter word HANDMADE
I've seen this crossword clue in Financial Times
H
A
N
D
M
A
D
E
Buddy explains!

The straight part
We know that "is her own work" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case is her own work = handmade.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 HANDMADE mean?
HANDMADE noun- An art or craft object made by hand.
- Manufactured by hand.