A case of seediness? (3)

I believe the answer is:

pod

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'a case' is the definition.
(I know that pod is a type of husk)

I cannot understand how the rest of the clue works.

(Other definitions for pod that I've seen before include "Seed case; whale herd" , "Seed vessel" , "Pea shell" , "Seed carrier (eg, pea)" , "Small school of whales" .)

I've seen this clue in the Evening Standard.

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