The most common and most likely answer to this crossword clue is the 6 letter word GALLIC
I've seen this crossword clue in The Guardian
G
A
L
L
I
C
More clues leading to the result GALLIC
- Private collection primarily including the works of such as Balzac
- French annoyance with territories close to France suffering setback
- French lass left in charge
- Miss leading to defeat mainly for French
- French singer returned after third of August
- French government with a Liberal left in charge
- French girl left in charge
- French General Assembly liberals in charge
- Something disagreeable about arresting one of the French
- French annoyance over islands to the north
Buddy explains!

The straight part
We know that "French" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case french = gallic.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 GALLIC mean?
GALLIC adjective- Of, pertaining to, or derived from galls.
- Of or pertaining to gallic acid or its derivatives.
- Relating to, or containing, gallium.