Crossword Genius

Pray tell me the name of the girl (3,5)

Ross

I believe the answer is:

say grace

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

'pray' is the definition.
(thesaurus)

'tell me the name of the girl' is the wordplay.
I cannot quite see how this works, but
'tell' could be 'say' (synonyms) and 'say' is found within the answer.
'name' could be 'grace' and 'grace' is found within the answer.
No letters remain.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in the Evening Standard.
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