Related Clues:

• Word of assent
• Authorize
• Hunky-dory
• Gives the green light
• 'Deal!'
• Allowable
• 'Why don't we?'
• 'Sure, why not?'
• So-so
• 'Why not?'
• Go-ahead
• Enthusiastic response
• In order
• 'Go ahead!'
• Sound