Possible Clues:

• In the blink ___ eye
• Blink ___ eye
• End ___ era
• End-era link
• In the blink __ eye
• Blink-eye link
• James Weldon Johnson's 'The Autobiography ___ Ex-Colored Man'
• In the twinkling ___ eye (2 words)
• End __ era
• The end ___ era