Possible Clues:

• 'As is,' e.g.
• Beware of what's in among the rocks at last
• Warning about the way Tom included
• Be warned that there's a hole in the rock at the end of this
• Warning a little time after where potholers enter
• 'Warning, proviso (6)'
• Warning of cold front of Arctic temperature, including hail
• Pussy is crossing avenue — caution!
• 'No returns,' e.g
• Warning at coming to end of grotto