Crossword Genius

You've never met this faultless unknown! (7,8)

Ross

I believe the answer is:

perfect stranger

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

'you've never' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'met this faultless unknown' is the wordplay.
'met' is a charade indicator (letters next to each other).
'this faultless' becomes 'perfect' (I've seen this before).
'unknown' becomes 'stranger' (synonyms).
'perfect'+'stranger' is 'PERFECT STRANGER'.

Can you help me to learn more?

(Another definition for perfect stranger that I've seen is " one one's not met before".)

I've seen this clue in the Sydney Morning Herald.
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