Moon and star diverted 'er? (10)

I believe the answer is:

astronomer

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

'moon and star diverted 'er?' is the definition.
I can't tell whether this definition defines the answer.

'moon and star diverted 'er?' is the wordplay.
'and' means one lot of letters go next to another.
'diverted' indicates anagramming the letters (letters must be diverted to different positions).
'moon' after 'star' is 'starmoon'.
'starmoon' anagrammed gives 'astronom'.
'astronom'+'er'='ASTRONOMER'

Can you help me to learn more?

(Other definitions for astronomer that I've seen before include "Sky-at-night observer" , "Stargazer" , "Dorado may be contemplated by me" , "Moon starer (anag.)" , "Moon-starer (anag)" .)

I've seen this clue in The Telegraph.

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.