Food, food, food!

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Across
  1. 3. An area of Italy
  2. 5. Improve the quality of something
  3. 6. A small green or black fruit often used to make oil
Down
  1. 1. A way of describing food that is not good for you
  2. 2. Pick and collect crops
  3. 4. Remove something from a surface using a tool
  4. 6. A liquid made from plants