Possible Clues:

• ''I don't like the looks of that''
• Cry after a spill
• 'This could be bad!'
• ''Looks like trouble''
• A little radioactive matter in contact with the molecular constituents of water: whoops!
• There's trouble on the far right you wish to quash
• Rats' relative
• 'This isn't looking good...'
• "Could be a problem"
• ''The party's over!''