Related Clues:

• Final word of 'Ulysses'
• Direct mail sticker
• OK
• Passing assistance?
• 'Let's do it!'
• Encouraging word
• 'Right'
• 'Undeniably'
• Formal vote
• Roll-call vote
• Thumbs-up response
• Its anagram is a synonym of itself
• Never-failing
• 'Amen!'
• Agreeable reply