Eight-person band (5)
I believe the answer is:
octet
'eight-person band' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for octet that I've seen before include "A group of eight instruments or voices" , "Musical work for eight" , "Mendelssohn wrote this" , "Eightsome" , "Musical composition for eight performers" .)