Lacking musical backing (1,8)

I believe the answer is:

a cappella

(Other definitions for a cappella that I've seen before include "not accompanied" , "Unaccompanied singing" , "Sung without instrumental accompaniment" , "Palace pal singing without musical accompaniment" , "Of choral music, unaccompanied" .)

I've seen this clue in the Sydney Morning Herald.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.