Cyril's rewritten words (6)
I believe the answer is:
lyrics
'words' is the definition.
(I have seen 'Words of songs ' mean 'lyrics' so perhaps 'words' could also mean 'lyrics')
'cyril's rewritten' is the wordplay.
'rewritten' is an anagram indicator.
'cyrils' with letters rearranged gives 'LYRICS'.
(Other definitions for lyrics that I've seen before include "Words used in songs" , "Words of a pop song" , "Short song-like poems" , "words to perform" , "words in numbers" .)