Sailor put in a cellar (4)

I believe the answer is:

salt

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This could be a double definition.

'sailor' is the first definition.
(salt is a kind of sailor)

'put in a cellar' is the second definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.

Can you help me to learn more?

(Other definitions for salt that I've seen before include "Liveliness" , "Wit; sodium chloride" , "Mariner; sodium chloride" , "Crystalline substance used to season food" , "Preserve" .)

I've seen this clue in The Globe and Mail.

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