Following behind speaker, I love to offer something musical (8)
I believe the answer is:
oratorio
'something musical' is the definition.
(type of musical work)
'following behind speaker i love' is the wordplay.
'following' is a charade indicator (letters next to each other).
'behind' says to put letters next to each other.
'speaker' becomes 'orator' (orator is a kind of speaker).
'love' becomes 'o' (love means zero in tennis).
'orator' next to 'i' is 'oratori'.
'oratori' next to 'o' is 'ORATORIO'.
'to offer' is the link.
(Other definitions for oratorio that I've seen before include "Musical composition usually with biblical theme (8)" , "Major choral work" , "Musical setting for a religous text" , "Eg, Walton's Belshazzar's Feast" , "Work for voices, chorus and orchestra with biblical theme" .)