Infinity plus ?????? (6, 1, 5, 1, 5, 2)

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Across
  1. 3. Satan presses this button
  2. 4. Hazel without the Haze is just...
  3. 6. World Famous Gentleman Sleuth
Down
  1. 1. Obscure Irish Last Name
  2. 2. Answer of the crossword
  3. 5. Hazel does this in Mario Kart