Crossword Genius

Finally, the say-so comes from the old goddess (3)

Ross

I believe the answer is:

eos

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

'goddess' is the definition.
(I know that Eos is a goddess)

'finally the say-so comes from the old' is the wordplay.
I cannot quite see how this works, but
'from' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
The remaining letters 'es' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for eos that I've seen before include "Greek god of the dawn" , "Greek dawn goddess" .)

I've seen this clue in the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.