Crossword Genius

Primary producer to target evolving green trade (6,8)

Ross

I believe the answer is:

market gardener

I'm a little stuck... Click here to teach me more about this clue!

'primary producer to target evolving green' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'trade' is the wordplay.
I cannot really see how this works, but
'trade' could be 'market' (marketing is a kind of trading) and 'market' is located in the answer.
The remaining letters 'gardener' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Another definition for market gardener that I've seen is " farmer".)

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