Ding-a-ling
I believe the answer is:
dodo
'ding-a-ling' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dodo that I've seen before include "Extinct bird of Mauritius, very dead" , "Old bird" , "Square" , "Proverbially dead bird" , "Mauritian bird no more" .)