"Toodles!" (4)
'toodles' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ciao that I've seen before include "Italian salutation" , "parting word" , "European's greeting" , "Hi - bye" , "Italian hello-goodbye" .)
(Other definitions for tata that I've seen before include "cheerio!" , "So long!" , "See you" .)
(Other definitions for cheerio that I've seen before include "Say this before drinking" , "Informal farewell" , "Final message" , "Ta-ta" , "good health" .)