Run repeatedly to bring last message (3-3)
I believe the answer is:
bye-bye
'last message' is the definition.
'bye-bye' can be an answer for 'message' (bye-bye is a kind of message). I'm unsure of the 'last' bit.
'run repeatedly' is the wordplay.
'run' becomes 'bye' (type of cricket run).
'repeatedly' indicates the doubling of some letters.
'bye' doubled is 'BYE BYE'.
'to bring' is the link.
Can you help me to learn more?
(Other definitions for bye-bye that I've seen before include "Cheerio" , "Ciao!" , "Ta-ta" , "See you" , "Informal repetitive farewell" .)