| Radical anti-Amer. socialist, per Rick Santorum | 47 |
| Radical campus gp. | 18 |
| Radical campus org. | 19 |
| Radical change in character | 27 |
| Radical coll. group | 19 |
| Radical college org. | 20 |
| Radical degrees | 15 |
| Radical derived from an acid | 28 |
| Radical diet | 12 |
| Radical European youths | 23 |
| Radical found in garlic | 23 |
| Radical French revolutionary | 28 |
| Radical gp. in 1974 news | 24 |
| Radical group | 13 |
| Radical group of the 70's, briefly | 38 |
| Radical grp. of the '60s | 28 |
| Radical Hoffman | 15 |
| Radical in a lab | 16 |
| Radical in aspirin | 18 |
| Radical leader | 14 |
| Radical leftist gp. that had an emblem of a seven-headed cobra | 62 |
| Radical maneuver | 16 |
| Radical member | 14 |
| Radical Mideast group | 21 |
| Radical Newton | 14 |
| Radical opponent | 16 |
| Radical org. | 12 |
| Radical org. in 1974 headlines | 30 |
| Radical org. in the 60's | 28 |
| Radical org. of the '60s | 28 |
| Radical pessimists | 18 |
| Radical reorganization | 22 |
| Radical results? | 16 |
| Radical sixties gp. | 19 |
| Radical Solanas who wrote "The SCUM Manifesto" | 56 |
| Radical solution? | 17 |
| Radical sort | 12 |
| Radical steps | 13 |
| Radical student org. | 20 |
| Radical young activists: Slang | 30 |
| Radical ___ | 11 |
| Radical's departure? | 24 |
| Radical's position | 22 |
| Radical, slangily | 17 |
| Radicals | 8 |
| Radicals' bash? | 19 |
| Radicchio alternative | 21 |
| Radicel | 7 |
| Radiciferous | 12 |
| Radicle | 7 |
| Radii | 5 |
| Radii companions | 16 |
| Radii neighbors | 15 |
| Radii of wheels | 15 |
| Radii partners | 14 |
| Radii relatives | 15 |
| Radii's partners | 20 |
| Radii, e.g. | 11 |
| Radii-paralleling bones | 23 |
| Radio "good buddy" | 28 |
| Radio abbr. | 11 |
| Radio activity? | 15 |
| Radio actor Soule | 17 |
| Radio actress Rich et al. | 25 |
| Radio actress turned South American first lady | 46 |
| Radio ad | 8 |
| Radio adjunct | 13 |
| Radio adventure series | 22 |
| Radio advice-giver | 18 |
| Radio amateurs | 14 |
| Radio and Disco, e.g. | 21 |
| Radio and newspapers, e.g. | 26 |
| Radio and television | 20 |
| Radio and television org. with francophone offerings | 52 |
| Radio and TV | 12 |
| Radio and TV, e.g. | 18 |
| Radio announcer Husing | 22 |
| Radio announcer's blunder | 29 |
| Radio annoyance | 15 |
| Radio antenna | 13 |
| Radio antennas | 14 |
| Radio appurtenance | 18 |
| Radio audience | 14 |
| Radio band switch | 17 |
| Radio band, for short (HEF anagram) | 35 |
| Radio bands | 11 |
| Radio blast from the past | 25 |
| Radio booth sign | 16 |
| Radio booth warning | 19 |
| Radio bribe | 11 |
| Radio broadcast | 15 |
| Radio broadcast interference | 28 |
| Radio broadcast options | 23 |
| Radio broadcast: Abbr. | 22 |
| Radio broadcaster: Abbr. | 24 |
| Radio buddy | 11 |
| Radio buffs | 11 |
| Radio button | 12 |
| Radio button, e.g. | 18 |
| Radio buttons | 13 |