Related Clues:

• Sort-of opposite of 16 Across
• 'Ahh, OK'
• Latin meaning of ''video''
• 'Ah, right'
• '88 Hall & Oates album "___ Yeah!"
• Faces "___ La La"
• Jason Mraz "The World As ___ It"
• Goes with an "aah"
• Words from a therapist
• 'Aha!' ... or a hint to 18-, 23-, 37-, 48- and 58-Across
• "Now it makes sense"
• Expression of dawning comprehension
• 'What a Wonderful World' starter
• "Wow, that's exciting!"
• ''It's obvious now''