Lively young woman's coffee-drinking diet regularly used (7)

I believe the answer is:

ladette

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'lively young woman's coffee-drinking diet regularly used' is the definition.
I can't tell whether this defines the answer.

'coffee-drinking diet regularly used' is the wordplay.
'coffee' becomes 'latte' (type of coffee drink).
'drinking' means one lot of letters goes inside another (inserted letters are consumed or drunk).
'regularly used' means one should take alternating letters (letters selected on a regular basis).
The alternating letters of 'diet' are 'de'.
'latte' going around 'de' is 'LADETTE'.

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(Other definitions for ladette that I've seen before include "Loutish female" , "Uncouth youth drinking lager in a short skirt?" , "Coarse young woman" , "Tomboy" , "boozy girl" .)

I've seen this clue in The Guardian.

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