The most common and most likely answer to this crossword clue is the 9 letter word CARTRIDGE
I've seen this crossword clue in The Times
C
A
R
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More clues leading to the result CARTRIDGE
- Bullet casing with raised line found behind barrow?
- Case for explosive in vehicle on crest
- Carry top of the range ammunition
- What's spent on shooting game, a hundred for a penny originally
- Explosive case of vehicle appearing over crest
- Doctor's left university for right case
- Trace grid out one found in magazine
- There will be a charge in this case
- Magazine about game birds with no wings
- Credit rag with editing item in magazine
Buddy explains!

The straight part
We know that "What's spent on shooting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what's spent on shooting = cartridge.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 CARTRIDGE mean?
CARTRIDGE noun- The package consisting of the bullet, primer, and casing containing gunpowder; a round of ammunition.
- (by extension) A prefabricated subassembly that can be easily installed in or removed from a larger mechanism or replaced with another interchangeable subassembly.
- A vessel which contains the ink or toner for a computer printer and can be easily replaced with another.
- Magnetic tape storage, used for storing (backup) copies of data.
- A removable enclosure containing read-only memory devices, used for rapid loading of software onto a home computer or video game console.
- A small paper package, e.g. in an old book about making printer's type: After all the type has been cast: "The Boy will paper up each sort in a cartridge by itself".