Shhhh… this ti or ci crossword is sleeping…

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Across
  1. 5. When germs enter the body and make you ill.
  2. 6. A maths operation that means taking away.
  3. 8. A part of something larger.
  4. 9. To be thankful for something.
Down
  1. 1. Someone who works in government.
  2. 2. Tasty and enjoyable to eat.
  3. 3. Something you give to make an idea clear.
  4. 4. A course you follow to get from one place to another.
  5. 7. Another word for ‘particularly’.