Rap performance overheard offers dark scene (8)
I believe the answer is:
nocturne
'dark scene' is the definition.
(type of artwork)
'rap performance overheard' is the wordplay.
I cannot really understand how this works, but
'performance' could be 'turn' (turn is a kind of performance) and 'turn' is found in the answer.
This may be the basis of clue (or it may be nonsense).
'offers' acts as a link.
(Other definitions for nocturne that I've seen before include "Pensive piano piece" , "Chopin piece" , "Dreamy night music" , "Picture of a night scene" , "Pensive lyrical piece of music" .)