Reliable

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Across
  1. 3. The action of leading a group of people or an organization.
  2. 5. Detailed examination of the elements or structure of something.
  3. 8. The quality of being outstanding or extremely good.
Down
  1. 1. Achieving maximum productivity with minimum wasted effort or expense.
  2. 2. Keeping or showing a balance; arranged in good proportions.
  3. 4. Consistently good in quality or performance; able to be trusted.
  4. 6. Reasoning conducted or assessed according to strict principles of validity.
  5. 7. Combining or coordinating separate elements so as to provide a harmonious, interrelated whole.