Related Clues:

• Old sort of sign, nothing in it portending evil
• Zero, less than zero, about zero? That's awful as forecast
• Old note with sense that's threatening
• Portentous doctor lifted one with commonsense
• 0-0, two places above bottom, is worrying
• Threatening nothing less, accepting nothing
• Nothing in sumo wrestling is threatening
• Zero common sense applied to motorway is threatening
• Round ring, nothing less menacing
• Threatening, foreshadowing something bad
• Foreshadowing something bad
• Forbidding nothing, and negative about nothing
• Sinister-looking
• Portending something bad
• Order, I sense, is threatening