paul:
Crisp Ellington cut of "Mood Indigo" (5)
One definition of spell is mental or psychological state.
CriSP ELLington cut
Cut means both excision or portion and recording or recording track.
"Mood Indigo" is one of Duke Ellington's most famous songs, and it basically means a blue mood.
And crisp is a word often used for a performance or for recording quality.