Chamber group, perhaps (5)
I believe the answer is:
octet
'chamber group perhaps' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for octet that I've seen before include "Composition for eight musicians" , "Mendelssohn or Schubert piece" , "Group of eight players" , "music group" , "Eightsome" .)