Second prominent feature of Stalin maybe in store (5)

I believe the answer is:

stash

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'store' is the definition.
(I know that stash is a type of store)

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

(Other definitions for stash that I've seen before include "Secret store of valuables" , "(Illegal) hoard" , "Secret hoard" , "Squirrel away" , "Hide in a secret place" .)

I've seen this clue in The Guardian.

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