Crossword Genius

Person increasing in productivity? (6)

Ross

I believe the answer is:

grower

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

I don't understand the rest of the clue.

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(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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