The most common and most likely answer to this crossword clue is the 9 letter word PERSONNEL
I've seen this crossword clue in Financial Times
P
E
R
S
O
N
N
E
L
More clues leading to the result PERSONNEL
- Staff repel son fraudulently claiming compensation, finally
- Staff roles Penn ballsed up
- How bard might be paid shortly before fifty staff
- Staff thus after end of seminar tucked into pasta and left
- Navy takes issue when commandeered by Shell staff
- Retired salesman sacked Nelson’s workforce
- Relative in the navy is under cover in HR
- A child bearing large staff
- Staff training run by Dicky Nelson
- Staff outside welcoming lad in navy
Buddy explains!

The straight part
We know that "staff" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case staff = personnel.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 PERSONNEL mean?
PERSONNEL noun- Employees; office staff.