A shoot from Brussels, perhaps (6)

I believe the answer is:

sprout

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'a shoot' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

(Other definitions for sprout that I've seen before include "Bud; a type of cabbage" , "Grow like Proust" , "Begin to develop" , "Spring up like vegetable from Brussels" , "Produce new growth" .)

I've seen this clue in the Sydney Morning Herald.

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