Clue

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Across
  1. 2. Soothes the savage beast (3rd)
  2. 4. Stiff paper greeting (ist)
  3. 5. Opposite of and (10th)
  4. 7. Antonym of out (17th)
  5. 8. Large jetliner number (9th)
  6. 12. Short for promotion (15th)
  7. 13. Opposite of front (18th)
  8. 14. Not a letter (5th)
  9. 15. Pigs or bears (6th)
  10. 16. Tome (4th)
  11. 17. Junior Royal servant's title (8th)
Down
  1. 1. Medium steak (13th)
  2. 3. Wrap (19th)
  3. 5. Antonym of off (7th)
  4. 6. Homophone of a number (12th)
  5. 7. Not out (2nd)
  6. 9. Guild's purpose (11th)
  7. 10. Highly prized (14th)
  8. 11. Homophone of won (16th)