Related Clues:

• Kenny Chesney "When ___ This Bar"
• Reaction to a magic trick
• Last two words of "Amazing Grace"
• ''Good to know''
• '__ skies of blue and clouds of white ... ': 'What a Wonderful World'
• "__ skies of blue and clouds of white ... ": "What a Wonderful World"
• 'Ver-r-ry interesting!'
• 'That is sooooo cool!'
• "Aah" counterpart
• Tracy Chapman "Maybe when and if ___ you again"
• Partner of 55-Across
• Gasp at a fireworks show
• "Now it's clear"
• '___, I'm so scared! (not really)'
• Acknowledgment of a sort