Storage structure

I think it could be either:

Which length description are you looking for?:

shed

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

This is all the clue.

(Other definitions for silo that I've seen before include "Farm tower" , "Grain storage tower" , "Tower for making fodder" , "Storage tower for oils" , "Tower used for storing fodder" .)

I've seen this clue in The Wall Street Journal and the Universal.

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