Store for later use in bar (4)

I believe the answer is:

save

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

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

(Other definitions for save that I've seen before include "Be frugal" , "Be economical" , "Salvage" , "Set aside" , "Rescue; store" .)

I've seen this clue in The Telegraph.

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