Related Clues:

• Word of assent
• Cry of delight
• 'Uh-huh'
• Authorize
• 'You bet!'
• Slangy approval
• 'I knew it!'
• Hunky-dory
• Gives the green light
• 'Deal!'
• Allowable
• 100%
• It's positive
• 'Why don't we?'
• Up, as a vote