27.

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Across
  1. 5. This candidate cannot fail to get a seat (9)
  2. 6. Doesn't sit in order to get a seat? (6)
  3. 7. Act evasively to gain time
  4. 10. Young animals produced as a result of a fright! (7)
  5. 11. Produced, as a literary work
  6. 14. Act evasively with royal donors in the gallery (12)
  7. 17. A little starter with Tory (7)
  8. 18. "Little" starter
  9. 19. Give artist a seat in the house? One would kill for her in Greece! (7)
  10. 21. Attempting to get a seat? (8)
  11. 22. Tried to get a seat
  12. 23. Director in Prague working to get a seat in first-class coming from coach (7)
  13. 24. He has a seat in the House
Down
  1. 1. Tried to get a seat, but unsuccessfully! (5)
  2. 2. 'A pecan produced as a little appetiser'
  3. 3. Prompt to get a sit-in arranged (9)
  4. 4. Little starter
  5. 8. Stood, say, but did take a seat in the house (7)
  6. 9. Try to get a seat
  7. 12. Produced, as a sound
  8. 13. Take up residence to get a seat
  9. 14. Rich dark Japanese soy sauce produced as a by- product of making miso, often used as a dip with sushi, tempura etc. (6)
  10. 15. Produced, as a play
  11. 16. Who had managed to get a seat?
  12. 20. Viscountess who became the first woman to take a seat in the House of Commons in 1919 (5)
  13. 21. Act evasively to get a seat in the theatre