| Answer | Crossword Clue |
|---|---|
| BEEP | Signal from space. |
| SETI | Space-signal searcher's acronym |
| CUE | Signal from offstage |
| SOS | Signal from Sparks |
| SOS | Signal from a marooned sailor |
| SOS | Signal from a sinking ship |
| PSST | Signal from a note passer |
| BLIP | Signal from a radar screen. |
| FLARE | "Help" signal fired from a gun |
| BEAM | Radio signal from a landing field. |
| SOS | Signal from the Titanic: April, 1912 |
| WAVEGOODBYE | Signal to from the pier, perhaps |
| FLARE | Light signal shot from a Very pistol. |
| STEAL | Signal from the third base coach, maybe |
| WHYO | Gangster: From the signal cry of a former N. Y. C. gang. |
