Related Clues:

• No alternative
• Unambiguous response
• 'Let's!'
• Okay word?
• "Amen!"
• Affirming word
• One of two definitive responses
• "Sure!"
• Happy cry
• Undoubtedly
• "You bet"
• ''Be happy to!''
• Victorious shout
• 'Fine by me'
• It's ''positively'' hidden four times in this puzzle