The most common and most likely answer to this crossword clue is the 12 letter word NEUROSURGEON
I've seen this crossword clue in Financial Times
N
E
U
R
O
S
U
R
G
E
O
N
More clues leading to the result NEUROSURGEON
- New EU money to encourage highly-skilled operator
- Foreign money, yen, accepted by no French doctor
- One rogue's run off — “brainy” operator?
- Gone off with our nurse? One might do that!
- Northern pieces encourage top person in theatre
- Doctor, Frenchman’s negative about his cash flow
- Poles lodging currency to encourage medical professional
- Doctor’s run, gone dubiously to hide money in France?
- New money to encourage specialist in theatre
- New multinational money to encourage skilled operator
Buddy explains!

The straight part
We know that "top person in theatre" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case top person in theatre = neurosurgeon.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 NEUROSURGEON mean?
NEUROSURGEON noun- A surgeon specializing in brain surgery.