Sustainable operations concerned with biking and flora (9,6)

I believe the answer is:

recycling plants

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'sustainable operations' is the definition.
Although both the answer and definition are plural nouns, I don't understand how one could define the other.

'concerned with biking and flora' is the wordplay.
'concerned with' becomes 're' (re can mean regarding or about).
'biking' becomes 'cycling' ('cycle' can be a synonym of 'bike').
'and' means one lot of letters go next to another.
'flora' becomes 'plants' (I've seen this before).
're'+'cycling'+'plants'='RECYCLING PLANTS'

Can you help me to learn more?

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

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