1: Monsieur is immersed in unspecified French river (5)

5: Legendary rich guy gets called, then folds (7)

8: Good Republican source of life-giving system for short-handed office workers (5)

9: Driver who's disappeared in conflict (7)

11: Canadian water ordered for regal tea-break (5,4,4)

12: Determine Cartesian coordinates? (9)

16: 500 = 100 + 0 - that's entertainment! (5)

18: It might reside in monument! (5)

20: The stagecoach industry (9)

21: Fling an item of furniture (3,5,5)

25: Keeps turning nastier (7)

26: Demonstrated the way in which to keep poles apart (5)

28: Half of them should have had an idea (7)

29: Not here? No, no! (5)

1: Town's rail transport, not express? (9)

2: Satanic personification in 'Anthem A-Gogo' (5)

3: I am reported to leer (3)

4: True side (5)

6: Composer employed in hotel garage (5)

7: Some slippers and also shoes (7)

10: Fish spawn upstream in little orifices (3)

13: Control escape (3)

14: Help found in Adelaide. (3)

15: Neil lost a letter and ended up with nothing (3)

16: Get into the archeology scene. (3)

17: Open present yonder (4,5)

19: Eminent performer in some art form (7)

21: Leaders of Orioles and Rangers stick in the dugout? (3)

22: Fancy decoration thats cool on the surface? (5)

23: Dixie, perhaps, greeting Japanese food (5)

24: Ball mislaid? Caned (5)

27: Cot is unmade for short month in fall (3)