Possible Clues:

• Group of seven
• Set of seven
• Magnificent group knowing a little?
• Quintet plus two
• A series or group of seven
• Group once fashionable — a little
• Proverbial vices, for example, awful pet had
• The seas, e.g.
• Principal drinking port had one over the eight? Not quite that many!
• Odd grouping in exercise held by chief