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Across

4. Development
5. Sparkling particles
6. Forceful effect
9. Investigation
11. Slow progress
12. Significant past
14. Calm period
16. Distant line
18. Central theme
21. Travel
22. Crop collection
23. Endless
24. Great bravery
25. Compassion

Down

1. Fairness
2. Street art
3. Earth’s pull
7. Lightest element
8. Picture in mind
10. Deep understanding
13. Very large
15. Natural scenery
17. Comprise
19. Magnificent
20. Intellectual prodigy