Crossword Genius

Training series that’s raised a genius with figures (9)

Ross

I believe the answer is:

nurturing

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

'training' is the definition.
(thesaurus)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for nurturing that I've seen before include "Rearing; cherishing" , "Training up" .)

I've seen this clue in The Times.
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.