Related Clues:

• Plus
• Leases
• 'O.K., why not?'
• Permissible
• Thumbs up
• Green light
• 'Oh, why not?'
• Endorse
• Sanction
• Initial, say
• Answer to 'Shall we?'
• Acceptable
• Correct
• 'Is that all right?'
• Positive reply to an invitation