Crossword Genius

Ecological style of writing about to be promoted (5)

Ross

I believe the answer is:

green

'ecological' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for green that I've seen before include "Environment-friendly" , "Murderer" , "political activist" , "Politician; fresh" , "Politician perhaps" .)

I've seen this clue in The Guardian.
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