Not quite the girl for Romeo? (5)

I believe the answer is:

julie

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

'romeo?' is the definition.
Both the answer and definition are singular nouns.
Maybe you can see a link between them that I can't see?

'not quite the girl' is the wordplay.
I cannot quite understand how this works, but
'girl' could be 'juli' and 'juli' is found in the answer.
A single letter 'e' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

'for' acts as a link.

Can you help me to learn more?

(Another definition for julie that I've seen is " Best Actress Oscar winner 1964, for 'Mary Poppins'".)

I've seen this clue in the Evening Standard.

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