Girl chasing bubbly and song (8)
I believe the answer is:
cavatina
'song' is the definition.
(I know that cavatina is a type of aria)
'girl chasing bubbly' is the wordplay.
'girl' becomes 'Tina' (girl's name).
'chasing' says to put letters next to each other (some letters chase after others).
'bubbly' becomes 'cava' (I have seen 'Spanish bubbly' mean 'cava' so perhaps 'bubbly' could also mean 'cava').
'tina' put after 'cava' is 'CAVATINA'.
'and' is the link.
(Other definitions for cavatina that I've seen before include "air" , "Simple operatic aria" , "simple song" .)