*Pepys famously split nappy when church forsook Our Lord? (7)

I believe the answer is:

diarist

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

'lord?' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see a link between them that I can't see?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for diarist that I've seen before include "Pepys, for example" , "One as Evelyn, Kilvert" , "chronicler" , "Pepys or Frank" , "eg Samuel Pepys" .)

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.