Coming again with note, bringing apology (6,2)
I believe the answer is:
pardon me
'apology' is the definition.
(I have seen 'Polite apology ' mean 'pardon me' so perhaps 'apology' could also mean 'pardon me')
'coming again with note' is the wordplay.
'coming again' becomes 'pardon' (I can't explain this - if you can you should give a lot more credence to this answer).
'with' says to put letters next to each other.
'note' becomes 'me' (alternative spelling the musical note mi).
'pardon'+'me'='PARDON ME'
'bringing' is the link.
Can you help me to learn more?
(Other definitions for pardon me that I've seen before include "Polite apology" , "Sorry" , "Say that again!" .)