Related Clues:

• Word of assent
• Nifty, in the 50's
• Authorize
• First-rate
• Slangy approval
• Hunky-dory
• 'Deal!'
• Allowable
• Peachy-keen
• Spiffy
• 'Far out!'
• Marvy
• Fine, informally
• 'Cool!'
• 'Sure, why not?'