Possible Clues:

• One needs them for 4 down
• There's not a single thing to be done about them
• Unions may spoil one among the furies
• I'm upset about a bishop taking a long time in church services perhaps
• There's not a single thing you can do about them
• Occasions that begin with misses?
• There's not a single thing for them
• They make two one
• That's the last of the singles; now for the doubles
• There's not a single state like those