| GEIGER | Pioneer in radiation detection |
| ROENTGEN | Pioneer in radiation (not green, sadly) (8) |
| DOSIMETER | Radiation detection device |
| HANS | Geiger of radiation detection |
| INFRAREDLIGHT | Heralding rift developing in radiation (8,5) |
| LEAD | Metal used in radiation shielding (4) |
| INFRARED | Drunk friend covers artist in radiation |
| AID | Help reversal in radiation |
| IONS | Particles charged in radiation sickness (4) |
| AMERICIUM | Element used in radiation research |
| LINAC | Short name for a type of particle accelerator used in radiation therapy (5) |
| REM | Blood type scrubbed from a lot of sheets in radiation unit |
| ISOTOPES | Spies too, strangely, are used in radiation treatment for cancer |
| CFCA | In 1922, the Star becomes a pioneer in broadcasting by establishing its own radio station _ _ _ _ ...and in 1923 it becomes the first radio station to broadcast a hockey game, launching the career of |
| STORMS | The pioneer in his field, David Hoadley began chasing what in North Dakota in 1956? (6) |
| TALESE | Pioneer in New Journalism in the 1960s-'70s |
| BLAZEATRAIL | Pioneer in lounge in club bar |
| VERDI | Venerated Italian composer, a pioneer in the eld of opera, made a senator in 1874 (5) |
| STREETPORTER | Janet, broadcaster born in 1946 noted as a pioneer in youth television (6,6) |
| LACLEDE | Early French pioneer in the United States |
