Septet minus a quartet? (4)

I believe the answer is:

trio

(Other definitions for trio that I've seen before include "Three together" , "Beethoven's 'Archduke': famous piece written for this ensemble" , "Three of a kind" , "Ensemble musical piece, eg Beethoven's 'Archduke'" , "Chamber group" .)

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.