Santa's Secret Mission

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Across
  1. 2. I’m a god, a planet, and I measure heat. What am I?
  2. 4. Large marsupial
  3. 5. I help you from your head to your toe. The more I work, the smaller I grow
  4. 7. Flying mammal
Down
  1. 1. A seed with three letters in my name. Take away two and I still sound the same
  2. 3. I can fly but have no wings. I can cry but I have no eyes. Wherever I go, darkness follows me
  3. 4. A bird, a fruit, a person
  4. 6. famous cartoon character