Tickle your brains...

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Across
  1. 4. Join the firsts and think further! : G-Lion-India-Xamarin
  2. 5. Keller und Knappich Augsburg (Apply same logic as you did for another hint!)
  3. 6. Sreeni, Uma, Soma...
Down
  1. 1. Hemodynamic recording
  2. 2. Ertwhile ATM
  3. 3. Project name