Related Clues:

• "Forget it!" (and a clue to this puzzle's theme)
• Words from one who's defeated
• "Dream on!"
• "Out of the question"
• "Not possible"
• 'Ain't happening'
• 'That's too hard to believe...'
• "That's too hard to believe..."
• 'You gotta be kidding me!'
• Turndown from the overcommitted
• Defeatist's phrase
• 'That can't be true!'
• "___ Help Myself" (Four Tops hit)
• Out of the question - lacks route
• One lacks the ability to follow 1 across.6 How awkward to write up in it