The most common and most likely answer to this crossword clue is the 4 letter word YVES
I've seen this crossword clue in Financial Times
Y
V
E
S
More clues leading to the result YVES
- Frenchman in safety vest
- Frenchman in tatty vest
- French fellow, OK penning verse?
- Frenchman certainly welcoming reduced volume
- One girl said he may be French
- I agree to entertain playing Frenchman
- Frenchman maybe playing parts very well
- Frenchman certainly very engaging
- French man or woman, say
- Frenchman provides a positive answer about centre of gravity
Buddy explains!

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.