The most common and most likely answer to this crossword clue is the 8 letter word LORRAINE
I've seen this crossword clue in Financial Times
L
O
R
R
A
I
N
E
More clues leading to the result LORRAINE
- Odd for Scots to appear in genealogical list for French duchy
- Whence one cross, in traditional tales, drops from sky
- Stories about wet girl
- Golden shower secreted by the French woman
- Girl’s learning to accept what Hugh Capet managed to do by the sound of it
- A fall in teaching of old French region
- Old bishop visiting unfamiliar alien part of France
- Stories about precipitation in French region
- Folk wisdom about weather in part of France
- French region's traditional stories about inclement weather
Buddy explains!

The straight part
We know that "Girl" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case girl = lorraine.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.