Diaries snitch about being converted (13)

I believe the answer is:

christianised

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

'diaries snitch about being converted' is the definition.
I can't tell whether this defines the answer.

'diaries snitch about' is the wordplay.
'about' indicates an anagram.
'diaries'+'snitch'='diariessnitch'
'diariessnitch' anagrammed gives 'CHRISTIANISED'.

Can you help me to learn more?

I've seen this clue in The Daily Express.

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.