Upton Sleeves

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Across
  1. 2. Opposite of out
  2. 4. You send this in the post (I barely know her)
  3. 7. In the process of killing someone
Down
  1. 1. Winner winner chicken dinner
  2. 3. An organisation of letters
  3. 5. The start of this sentence
  4. 6. Not mine, but… (-s)
  5. 8. Two letter word that is within this sentence