Nice valediction? (5)

I believe the answer is:

adieu

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'valediction?' is the definition.
(I have seen 'A valediction' mean 'adieu' so perhaps 'valediction' could also mean 'adieu')

I don't understand the rest of the clue.

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(Other definitions for adieu that I've seen before include "Farewel" , "Bye" , "Cheerio" , "Goodbye in France" , "Farewell, adios" .)

I've seen this clue in The Telegraph.

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