Bet Diana's doctor chose not to drink (9)

I believe the answer is:

abstained

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

'chose not to drink' is the definition.
I can't judge whether this defines the answer.

'bet diana's doctor' is the wordplay.
'doctor' is an anagram indicator.
'bet'+'dianas'='betdianas'
'betdianas' anagrammed gives 'ABSTAINED'.

Can you help me to learn more?

(Other definitions for abstained that I've seen before include "kept dry" , "went on the wagon" , "chose not to vote" , "was non-committal" , "avoided port?" .)

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.