Related Clues:

• Opposite of "yep"
• "Sorry, can't"
• 'Uh-unh'
• "Forget about it"
• "Nothing doing"
• Defeatist's phrase
• "Not gonna happen!"
• 'You're mistaken'
• 'Sorry, dude'
• "___ Help Myself" (Four Tops hit)
• One lacks the ability to follow 1 across.6 How awkward to write up in it
• See 1 across.6 Seems that Charles the Thousandth was a deep one
• "Sorry, got plans"
• "Ain't happening"
• 'Can't help ya!'