| Answer | Crossword Clue |
|---|---|
| RADIOIODINE | Certain tracer |
| TAIL | Tracer |
| LOCATOR | Tracer |
| LORAN | Nautical tracer |
| IODINE | Medical tracer |
| SONAR | Whale tracer |
| ATRA | Tracer competitor |
| TMAN | Fake bill tracer |
| VIC | Tracer of note |
| SDT | Tracer bullet: Abbr. |
| EEG | Brain-wave tracer: abbr. |
| HODOSCOPE | Tracer for ionizing particles |
| SEEK | Work as a tracer |
| IODINE | Medical tracer, at times |
| KEEN | Tracer of lost persons. |
| KEENE | Mr. ...., tracer of lost persons |
| MISTERKEEN | Old-time radio's "tracer of lost persons" |
