Group of eight players (5)
I believe the answer is:
octet
'group of eight players' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for octet that I've seen before include "Music for eight" , "Mendelssohn wrote this" , "A group of eight, may be singers" , "Work for eight players" , "Musical work for eight" .)