Song about rascal in idyllic setting (7)
I believe the answer is:
arcadia
'idyllic setting' is the definition.
'arcadia' can be an answer for 'setting' (I have seen 'pastoral setting' mean 'arcadia' so perhaps 'setting' could also mean 'arcadia'). I am not certain of the 'idyllic' bit.
'song about rascal' is the wordplay.
'song' becomes 'aria' (piece of music in an opera).
'about' means one lot of letters goes inside another.
'rascal' becomes 'cad' (both can mean a dishonourable person).
'aria' placed around 'cad' is 'ARCADIA'.
'in' is the link.
Can you help me to learn more?
(Other definitions for arcadia that I've seen before include "In Greece, its capital is Tripoli" , "Tom Stoppard play" , "rural paradise" , "ideal place in the country" , "Idyllic country of song-loving shepards" .)
