The most common and most likely answer to this crossword clue is the 9 letter word GRAPESHOT
I've seen this crossword clue in The Times
G
R
A
P
E
S
H
O
T
More clues leading to the result GRAPESHOT
- Terrible shortage limiting introduction of powerful ammo once
- Source of wine, mulled, perhaps — peppery stuff?
- Winemaker’s found with stolen ammunition
- Greek takes off with illegally obtained ammunition
- Ammunition shortage at sea brought about start of peace
- Oafs had to open rubbish bags, dispersing balls
- Balls from iron in golf, hit stroke over middle of green
- Fruit stolen and used as missiles?
- Fruit stolen – it’s clustered in balls?
- Charge for barrel of fruit recently stolen?
Buddy explains!

The straight part
We know that "ammunition" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ammunition = grapeshot.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 GRAPESHOT mean?
GRAPESHOT noun- A cluster of small iron balls, put together in canvas bag in order to be used as a charge for a cannon.