Small sausage (9)
'small sausage' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for chipolata that I've seen before include "Party snack" , "banger" , "Small thin sausage" , "Type of sausage" .)
(Other definitions for cheerio that I've seen before include "Final message" , "An informal hearty goodbye" , "Informal goodbye, sounds blithe" , "Farewell - drinking toast" , "good health" .)