Acoustic No 1 songs (6)

I believe the answer is:

lieder

I'm a little stuck... Click here to teach me more about this clue!

'songs' is the definition.
(lied is a kind of song)

I can't explain the rest of the clue.

(Other definitions for lieder that I've seen before include "German Romantic songs for solo voice" , "Relied on classical German song" , "German songs of the Romantic period" , "works by Schubert" , "German songs for piano and solo voice" .)

I've seen this clue in The Sunday Times.

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.