Planting seeds without last of seeds due (5)

I believe the answer is:

owing

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'due' is the definition.
(similar in meaning)

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

(Other definitions for owing that I've seen before include "This debt has yet to be paid" , "Outstanding as a debt" , "Still outstanding" , "Unsettled; on account" , "Unpaid" .)

I've seen this clue in The Times.

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