Related Clues:

• Give the nod to
• Sanction, in a way
• Astronaut's 'yes'
• "Is that all right with you?"
• "I'm down with that"
• In decent shape
• "All right?"
• Perfectly all right
• NASA's 'no prob'
• Gradually expand
• 'Sounds good!'
• Just so-so
• Fine, in space
• Verbal thumbs-up
• "Everything's fine!"