Minimum price accepted for stockpile (7)

I believe the answer is:

reserve

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'for stockpile' is the definition.
(synonyms)

I can't explain the remainder of the clue.

(Other definitions for reserve that I've seen before include "Set aside - shyness" , "Secure" , "Reticence" , "Book - spare player" , "Twelfth man < 's coolness" .)

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

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