Supernatural sort of seed? (6)

I believe the answer is:

sesame

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'sort of seed?' is the definition.

I don't understand how the rest of the clue works.

(Other definitions for sesame that I've seen before include "A seed; a TV Street" , "Open . . . . . . is a magic phrase to gain entry" , "Plant with oil-rich seeds" , "Plant grown for its seeds" , "Seeds producing an edible oil" .)

I've seen this clue in the Evening Standard.

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