Related Clues:

• Long-lived prog rock band
• 'Positively!'
• 'Getting to ___' (best-selling business book)
• "That's affirmative!"
• 'You're calling because ...?'
• Slangy "yes"
• ''I agree''
• 'Indeedy'
• Exclamation of elation
• Ja or da, stateside
• ''You got it''
• OK, formally
• A word to Virginia
• 'Assuredly'
• Start off from seer's approval