One flower arrangement for orchid fancier (4,5)

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Across
  1. 1. Mistress secreted in ionised oxygen chamber (4)
  2. 5. Goblin found dead in his flowers (7)
  3. 6. Lead church music (5)
  4. 8. Nervous man holding the gin cocktail (10)
  5. 11. Quiet river flowing in the way (6)
  6. 13. Important housework container? (3,3)
  7. 14. They're hung, drawn but not quartered! (8)
  8. 17. Bordello tidies up when the police use it! (8)
  9. 18. Short time in the corner (6)
  10. 20. Organisation of the French fever (6)
  11. 21. The Kinks got barred by hearing (4)
Down
  1. 1. Noticed some French confusion, then took it away (9)
  2. 2. Danger of big cat losing its head in outskirts of Jersey (8)
  3. 3. Foul foundation (4)
  4. 4. A number restricted by reef knots (5)
  5. 7. Patriot protects jazzmen (4)
  6. 9. Northern team or term (7)
  7. 10. Seven wickets remaining? (5,3,3)
  8. 12. They are said to cause problems for Scottish starter (3,4,5)
  9. 15. Model currency is a problem (7)
  10. 16. Bad drug is cool, man! (4)
  11. 19. Hospital in French countryside region (9)