Crossword Genius

Herb providing revenue for the farmer, we hear? (8)

Ross

I believe the answer is:

agrimony

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

'herb' is the definition.
(agrimony is a kind of herb)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for agrimony that I've seen before include "Growth" , "Plant with yellow flower-spikes" .)

I've seen this clue in The Guardian.
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