Possible Clues:

• Bring a graceless halt to mountaineering expedition?
• Fall over last letters found in upturned place
• Catch in a con
• Go wrong, putting last message into place the wrong way round
• (Cause to) stumble
• Expose lie in rising place around Split
• Keep from succeeding
• Journey over, make mistake
• Make a mistake in flight, it's inferred
• Throw off