Possible Clues:

• Is that the eleven coming in single file?
• Single file
• Royal autobiography, not appearing all at once?
• Eleven, separately?
• How Miss America contestants are introduced
• Like an eleven?
• Album made to count by Foo Fighters
• That's not the way they went into 32 across - to make the eleven, perhaps
• Such a singular way to make eleven?
• Perhaps eleven, not coupled