Periodical storage for arms (8)

I believe the answer is:

magazine

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'periodical' is the definition.
(I know that magazine is a type of periodical)

I can't explain the rest of the clue.

(Other definitions for magazine that I've seen before include "Section of a firearm" , "Periodic paperback publication" , "Periodical in arms depot" , "Storehouse for weapons" , "Rifle clip" .)

I've seen this clue in the Sydney Morning Herald.

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