the letter R crossword

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Across
  1. 1. a corrupted oil platform
  2. 2. farm alarm
  3. 3. a colossus addition to the piano family
  4. 6. a sudden awareness of Armageddon
  5. 8. of no discernible order
  6. 9. refuse to budge
Down
  1. 1. the heaviest of gas nobility
  2. 2. a few sprigs go a long way with time
  3. 3. ulna's neighbour
  4. 4. an avoidant musical or literary anchor
  5. 5. a fashionable means of aviation departure
  6. 7. symbol of why time is so valuable