Related Clues:

• Word of assent
• Cry of delight
• 'Uh-huh'
• 'You bet!'
• First-rate
• Slangy approval
• 'I knew it!'
• Hunky-dory
• It's positive
• Peachy-keen
• Fine, informally
• Up, as a vote
• 'Why not?'
• Go-ahead
• Super-duper