Possible Clues:

• At last the Dane gets confused when he's one over the eight
• A group or set of nine
• Anne gets confused when the editor comes round one over the eight
• Supreme Court or baseball team, e.g.
• Term for a group of nine
• The Supreme Court is one
• Group of 112-Down
• Need a N if you're one over the eight
• In the end, Ena is 30 across
• Group of nine (rare); Anne, Ed (anag.)