A delightful idiom from the Vendée? (5,6)

I believe the answer is:

acute accent

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'the vendee?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'a delightful idiom' is the wordplay.
'delightful' becomes 'cute' (I've seen this in other clues).
'idiom' becomes 'accent' (synonyms).
'a'+'cute'+'accent'='ACUTE ACCENT'

'from' acts as a link.

Can you help me to learn more?

(Another definition for acute accent that I've seen is " This vowel adjustment".)

I've seen this clue in The Telegraph.

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