Grain storage structure (4)

I believe the answer is:

silo

'grain storage structure' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for silo that I've seen before include "Cylindrical storage tower" , "Farm tower" , "Storage tower for oils" , "Store for grain or fodder" , "Storage pit, tower" .)

I've seen this clue in the USA Today and the Newsday.

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