The most common and most likely answer to this crossword clue is the 9 letter word GARIBALDI
I've seen this crossword clue in The Times
G
A
R
I
B
A
L
D
I
More clues leading to the result GARIBALDI
- Bourbons knocked back by this general: a vulgar, boring soldier
- Biscuit that's grand - a humorously vulgar one
- Biscuit good, a coarse one!
- Soldier eats a blue biscuit
- Loose blouse — Georgia with blue one
- Serviceman stabbed by a scurrilous patriot
- American soldier wraps a kind of snack
- Soldier scoffing a coarse biscuit
- A bad girl swiped one’s biscuit
- First of generals a licentious one, revered nationalist
Buddy explains!

The straight part
We know that "biscuit" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case biscuit = garibaldi.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 GARIBALDI mean?
GARIBALDI noun- A biscuit consisting of currants squashed between layers of flaky pastry.
- A bright yellow/orange damselfish, of the genus Hypsypops, from the seas of southern California.
- A kind of jacket worn by women.