Piece of music by rock band, with short piano introduction (7)

I believe the answer is:

requiem

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

'piece of music' is the definition.
(requiem is a kind of piece of music)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for requiem that I've seen before include "Funeral mass" , "Funeral music" , "Hymn of mourning" , "Mass for the souls of the dead" , "shark?" .)

I've seen this clue in The Independent.

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.