Related Clues:

• "Not possible"
• Turndown from the overcommitted
• Defeatist's phrase
• "___ 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"
• 'Sorry, you're on your own'
• "Sorry, you're on your own"
• Exclamation of frustration
• 'Sorry, already have plans'
• 'It's all too much!'
• Pessimist's comment
• '___ even'
• "Sorry, impossible"