WORD SPIRAL

Starting from 1, fill in the grid clockwise with four-letter words. The last letter of each word becomes the first letter of the next to reveal a Flammable gas.

1. Slimming plan 2. Upper-class person 3. Lose colour 4. Water jug 5. Encircle 6. Medal, slang 7. Microbe 8. Frame of mind

9. Gloomy, dismal 10. Eager

11. Bird's home 12. Short-term worker 13. Baked food items 14. Simple card game 15. Hand part 16. Insect