There will be a charge in this case (9)

I believe the answer is:

cartridge

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'this case' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for cartridge that I've seen before include "Credit rag (anag)" , "Tube with missile for shotgun" , "Sort of paper" , "Shotgun ammunition" , "Shotgun shell" .)

I've seen this clue in The Guardian.

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