Possible Clues:

• Like the Cheshire Cat's grin
• Part of WWW
• Like some missed pitches
• 'Eyes __ Shut'
• With 64-Across, like a town lacking restrictions ... and a hint to 17-, 23- and 32-Across
• Far from the mark
• Ample, as a doorway
• All-inclusive
• Extra spacious
• 'Open ___'