Related Clues:

• It's instrumental in arresting minor gangsters
• An ear, perhaps, for music played on this
• Street entertainment made with metal cylinder (alternatively, odd bits of grains)
• Eg, the liver
• Instrument decapitated Welshman
• Major ganglia - part of the brain, perhaps
• An instrument for gangsters to conceal
• Mouthpiece for musical instrument
• Ear, say, for a musical instrument
• Paper heart, perhaps
• Vital part of newspaper?
• Nothing published including leader of Guardian newspaper
• E.g. liver
• Newspaper, say, that often is stopped
• Brain possibly covered by major ganglia