Crossword Genius

Blessing from the French on leaving (5)

Ross

I believe the answer is:

adieu

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This clue might be a double definition.

'blessing' is the first definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'french on leaving' is the second definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

'from the' acts as a link.

Can you help me to learn more?

(Other definitions for adieu that I've seen before include "Fare thee well!" , "Leave" , "the last word in Paris" , "Gallic goodbye" , "Auf wiedersehen" .)

I've seen this clue in The Globe and Mail.
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