Each answer is the title of a well-known movie...
ACROSS
4. Teardrop flows for a broken relationship (8)
6. Spin the hated frog, until brown (3,9)
9. Immediate disaster as Neb crewman’s sly weapon explodes (first part, before 8 down) (10)
10. Unbalanced, like a legendary bird (5)
13. Happy interlingual anonymous fighter (9)
15. Disaster movie provokes small laughs (5)
16. Prideful monarch is audibly recumbent (3,4,4)
17. Selfish idea (now an internet phenomenon) and digit as a keepsake (7)
19. Patents, copyrights and trademarks lost in shipwreck! (5)
20. Taken, awaits rye dip mixture (second part, after 3 down) (4)
22. Mechanised fruit is on time (second part, after 12 down) (6)
23. Subway city-state, or milepost repositioned (10)
DOWN
1. A frog is confused by long-distance travel (5)
2. Flight to the Bahamas (2)
3. Taken, awaits rye dip mixture (first part, before 20 across) (8)
5. Nitrate mother turns from the light to the dark side (3,10)
7. Rick’s White House (10)
8. Immediate disaster as Neb crewman’s sly weapon explodes (second part, after 9 across) (3)
11. Marilyn’s Sugar is naturalised newspaper mogul (7,4)
12. Mechanised fruit is on time (first part, before 22 across) (1,9)
14. Shake saline strangely (6)
18. Threat mix disrupted Blair’s chambers (3,6)
21. Moot-like heist turns farcical (first part, before 25 down) (4,4)
24. Nutty carbohydrate, gangnam-style (6)
25. Moot-like heist turns farcical (second part, after 21 down) (2,3)