Raphus cucullatus in double act (4)
I believe the answer is:
dodo
'iraphus cucullatusi' is the definition.
I can't tell whether this definition defines the answer.
'double act' is the wordplay.
'double' says to double the letters.
'act' becomes 'do' (to do is to act or execute a task).
'do' duplicated is 'DODO'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for dodo that I've seen before include "Proverbially dead bird" , "Extinct bird of Mauritius, very dead" , "Large extinct bird" , "one finished?" , "Repetitive extinct animal" .)