Related Clues:

• Green light
• 'That's it!'
• Cry of success
• Aye-aye
• 'You betcha!'
• Endorse
• Sanction
• Proposal response
• Initial, say
• Toady's response
• Acceptable
• Correct
• 'Is that all right?'
• 'Indubitably'
• See 58-Down