Winter Maintenance

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Across
  1. 4. It's visible! You're probably wearing it right now! (3)
  2. 6. Big, yellow, driven around to make roads safer when it's cold (7)
  3. 7. Goes on the front of a gritter, helps to clear snow from the road (6)
  4. 8. We Make a _______ whether to grit or not! (8)
  5. 10. Forms when it's really cold on roads, almost impossible to see, very dangerous! (5, 3)
  6. 11. It's cold, it's round, you can chuck it at your mates! (8)
  7. 12. Slippery, dangerous and cold! (3)
Down
  1. 1. When water turns into ice (6)
  2. 2. the sites we work from, where we keep our plant and stock (5)
  3. 3. There's more of it in winter, it starts earlier and lasts longer! (8)
  4. 5. What sound would you hear dashing through the snow, in a one-horse open sleigh? (6, 5)
  5. 9. The change from December to January... (3, 4)