| Answer | Crossword Clue |
|---|---|
| ELM | A red one may be slippery |
| ELM | One may be slippery |
| ALERT | One may be red |
| FIR | One may be red, white or silver |
| DISCBRAKE | It may be used at a red light |
| polycythemia | An abnormally increased concentration of hemoglobin in the blood, either through reduction of plasma volume or increase in red cell numbers. It may be a primary disease of unknown cause, or a secondary condition linked to respiratory or circulatory disorder or cancer |
