Crossword Genius

Producer whose business is booming? (6)

Ross

I believe the answer is:

grower

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'producer' is the definition.
(grower is a kind of producer)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for grower that I've seen before include "Produce provider" , "One cultivating plants" .)

I've seen this clue in the Evening Standard.
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