The most common and most likely answer to this crossword clue is the 10 letter word AMANUENSIS
I've seen this crossword clue in Financial Times
A
M
A
N
U
E
N
S
I
S
More clues leading to the result AMANUENSIS
- One dictated to a football team measures one’s put together
- Copyist, one visiting a team in French quarters
- Copier a chap uses in novel
- Supply insane sum to retain a literary assistant
- Asian menus translated by stenographer
- ???
- PA a chap uses in resort
- Secretary uses name Susan, I fancy
- Man with an issue to resolve records what’s said
- Secretary of a Premier clubis taken on
Buddy explains!

The straight part
We know that "PA" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pa = amanuensis.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 AMANUENSIS mean?
AMANUENSIS noun- One employed to take dictation, or copy manuscripts.
- A clerk, secretary or stenographer, or scribe.