An offshoot of Brussels? (6)

I believe the answer is:

sprout

I believe this clue is a double definition.

'an offshoot' is the first definition.
(thesaurus)

'brussels?' is the second definition.
(I've seen this before)

'of' acts as a link.

(Other definitions for sprout that I've seen before include "Push out new shoots" , "Bud; a type of cabbage" , "Put forth shoots" , "Start growing" , "Spring up like vegetable from Brussels" .)

I've seen this clue in the Evening Standard.

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