Possible Clues:

• Music for a baseball team?
• Composition for nine players
• Hard to land the fish with such music
• Such music might get the Netherlands 1 across's possessions
• There's one in there but can't be any fish in parts
• The Muses, e.g.
• Nine-player chamber group
• Ninesome
• 23 down 26 down for such music
• Tennis impossible with this group