initial /e/

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Across
  1. 1. Someone very skilled at something
  2. 2. Proof that something is true
  3. 5. What you put a letter inside
  4. 6. Trying hard to do something
  5. 7. Something you crack for breakfast
  6. 8. Someone who works for a company
Down
  1. 1. Feelings like happiness or sadness
  2. 2. A long slippery fish
  3. 3. What gives you strength to move
  4. 4. The system of money and trade