Archetypal female in detox -- loner, right? Sadly (3,4,4,4)

I believe the answer is:

the girl next door

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

'archetypal female' is the definition.
The definition suggests a singular noun which matches the answer.

'detox loner right? sadly' is the wordplay.
'sadly' is an anagram indicator.
'detox'+'loner'+'right'='detoxlonerright'
'detoxlonerright' anagrammed gives 'THE GIRL NEXT-DOOR'.

'in' acts as a link.

Can you help me to learn more?

I've seen this clue in The Telegraph.

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