Florentine farewell (4)

I believe the answer is:

ciao

'florentine farewell' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for ciao that I've seen before include "See you in Italy" , "Italian's so long" , "Italian cheerio" , "European's greeting" , "Italian hello or goodbye" .)

I've seen this clue in the Newsday and The Wall Street Journal.

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