Related Clues:

• Hawaii's "main islands," e.g.
• Stable electron group, often
• Planets in the solar system, e.g.
• Trio + 5
• A group of eight
• Eight for music
• Group of eight voices
• Seven for music
• A group of eight voices
• Seven performers
• A group of eight singers
• A group of eight, say singers
• Group of eight, say singers
• A group of eight, may be singers
• A group of seven