Gold Anniversary

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Across
  1. 1. Yellow car from the West Midlands (4)
  2. 4. The act of a matador letting their cloak trail over a bull's head as it runs past (8)
  3. 6. Name of the octopus that correctly guessed the results of 2010 World cup (4)
  4. 8. As sweet by any other name (4)
  5. 10. Type of garden grown for research (9)
Down
  1. 2. Two make do with a bicycle (8)
  2. 3. Posh car (7)
  3. 5. Word formed each year from the past participle of the Latin word 'vertere' meaning to turn (11)
  4. 7. Authentic colour standard (4)
  5. 9. Number of US states (5)