Notes from Letter to the Philippians faithfully reproduced (5)
I believe the answer is:
music
'notes' is the definition.
(a piece of music is made up of musical notes)
'letter to the philippians faithfully reproduced' is the wordplay.
'letter to the philippians' becomes 'mu' (letter from the Greek alphabet).
'faithfully reproduced' becomes 'sic' ('sic' indicates an error has been quoted correctly).
'mu'+'sic'='MUSIC'
'from' acts as a link.
(Other definitions for music that I've seen before include "orchestral work" , "Art (of noise)" , "melodies" , "Harmonious sound (generally!)" , "Identical" .)