Where most crops are systematically stored, moving left (5)

I believe the answer is:

field

'where most crops are' is the definition.

I don't understand the rest of the clue.

(Other definitions for field that I've seen before include "Pasture or crop land" , "Crop land; catch (ball)" , "Realm" , "Piece of farmland" , "Flodden?" .)

I've seen this clue in The Guardian.

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