Related Clues:

• Victorious shout
• "So cool!"
• '___ la la!'
• It's ''positively'' hidden four times in this puzzle
• ''Cool!''
• Ah partner
• ''Sure thing!''
• "Sure"
• 'Definitely!'
• ''All right''
• Opposite of 21-Across
• Certain definitive response
• "That's right!"
• Reaction to pyrotechnics
• "La la" lead-in