Catch-up Weekly Crossword: Subject to Change?

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Across
  1. 2. Study of the mind (10)
  2. 3. The art of art? (8)
  3. 6. French, Spanish, etc (9)
  4. 7. Chop chop? (7)
  5. 10. DIY (6,3,10)
  6. 14. Dextrous session (8,9)
  7. 15. Sowing (8)
  8. 16. Fries? (5)
  9. 17. Of atoms and flame? (7)
  10. 18. Around the World (9)
  11. 20. Deep thinking (10)
Down
  1. 1. Society insight (9)
  2. 4. Covers the Bible at Easter, usually (9,9)
  3. 5. In the past (7)
  4. 8. Crossword's theme? (6-8)
  5. 9. Breakfast? (7)
  6. 11. "Tricky words", perhaps? (7)
  7. 12. St. Ham (anag.) (5)
  8. 13. Picture-taking (11)
  9. 19. Jigsaw, possibly (4)