End of Term Crossword 2/3: Ye olde English

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Across
  1. 2. Unreliable indication of value, maybe (3,4,8,2,3,4)
  2. 4. Soul of wit (7)
  3. 6. Do (in second person?) (4)
  4. 8. Lie to get your own way (5)
  5. 10. Sparkle of daylight (or rhinestone adorned plants) (9)
  6. 15. Tournament area (4)
  7. 18. Antagonist that should try harder next time (6,5)
  8. 19. But why? (9)
  9. 20. What's done is... (4)
  10. 21. Generic (4-7)
Down
  1. 1. Descriptor of slaughterers, perhaps (4-7)
  2. 3. Shortest Shakespeare play (3,6,2,6)
  3. 5. Bland (10)
  4. 7. Hard at work... or hardly working? (6)
  5. 9. Parliament decline? (3)
  6. 11. Distaste (often severe) (5)
  7. 12. Given money to buy beverages for others (11)
  8. 13. Stall (5)
  9. 14. Such sweet sorrow (7)
  10. 16. Goodbye phrase (5,2)
  11. 17. I don't understand..? (5,2,2)