Related Clues:

• 'You betcha!'
• O.E.D. item
• '___, right!'
• Part of a Beatles refrain
• 'Right on!'
• Excellent, in modern slang
• Dict. listing
• OK
• 'Let's do it!'
• Encouraging word
• 'Amen!'
• O.E.D. offering
• Phone button trio
• Telephone trio
• Cool, modern-style