Sing (to a lover?) (8)
I believe the answer is:
serenade
'sing to a lover?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for serenade that I've seen before include "Music appropriate for evening" , "Piece sung beneath beloved's window" , "Murder" , "Evening love song" , "Romantic song under fair lady's window" .)