Related Clues:

• Stable electron group, often
• Planets in the solar system, e.g.
• Trio + 5
• Eight for music
• Set of eight notes
• Series of eight notes on a scale
• Group of eight voices
• A group of eight voices
• A verse of eight lines
• A series of eight notes
• A group of eight singers
• A group of eight, say singers
• Group of eight, say singers
• Eight consecutive notes on music scale
• A group of eight consecutive musical notes