Vacuous text about short times in Scotland is most cute (6)

I believe the answer is:

tweest

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'most cute' is the definition.
Both the definition and answer are superlative adjectives. Maybe there's a link between them I don't understand?

I don't understand the rest of the clue.

Can you help me to learn more?

(Another definition for tweest that I've seen is " Most quaint".)

I've seen this clue in The Sunday Times and The Times.

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