26.

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Across
  1. 2. "100% juice with no sugar ___" (nutritional claim on a juice bottle)
  2. 6. Unfamiliar, a claim on property (5)
  3. 7. Often-welcomed part of the week
  4. 8. A tree from a sandy seaside area, by the sound of it (5)
  5. 9. Favourites return for one part of operation (4)
  6. 10. Period of fine weather at this part of the week? (6)
  7. 13. One holding a claim on property
  8. 14. Send Granny for one piece of leftover cloth
  9. 17. A bit of a stretch for habit? (3)
  10. 19. Charity event reflecting on a part of culture?
  11. 21. Having no liking for one part of a hymn (6)
  12. 22. One with a claim on property
  13. 23. Show how to make a claim about us (7)
  14. 24. A sandy stretch for one part of the week
  15. 25. What's needed for 1 part of refrain -- strum enthusiastically! (10)
  16. 26. Toilsome part of the week
Down
  1. 1. String for one part of CD (4)
  2. 2. The man, with glee, is out to make a claim (6)
  3. 3. Using a cut design to make patterns
  4. 4. Sandy stretches exist beside pines (7)
  5. 5. Script for one part of Crime and Punishment in the school (5)
  6. 9. Part of the week, river's overpowering American divers
  7. 11. 'Intention to make a claim on a part'
  8. 12. Intent: to make 144 keys! (9)
  9. 15. Going on, a part of a yard
  10. 16. Irregularly, stayed outside university for part of the week
  11. 18. Make a claim in a win with hesitation
  12. 20. An enchanting way to make a claim for the silver (7)
  13. 22. Legal claim on a piece of property
  14. 24. It's modified, genetically modified, on a part of flower (6)