1: Baseball team against exhibiting high principals in old Assyrian capital (7)

4: Newton committed to figure out research (3,4)

8: Propane explodes, theoretically (2,5)

10: Reportedly scans orchestra section (5)

11: Consumed, beginning at the end (3)

12: Central matter for physicists luncheon: rocks releasing hydrogen (7)

14: Rooster embraces fool in a frock (7)

16: Diverting a dupe with wrong input (7)

18: Ways in which Mandela's party holds first equitable positions (7)

19: Nits are possibly more unpleasant (7)

22: Wanderer features in ones best adage (7)

24: Control escape (3)

25: Fruit found in Carmel only (5)

26: Bundy under English seabird thats forever! (7)

28: Yes, MBAs worked with a diplomatic staff (7)

29: Seal simpers forlornly (7)

1: Pests in a census? Distorted. (9)

2: Trunk contains piece of old knotted rope (5)

3: Sixpence for big cheese? (1.1.1.)

5: Measuring exotic flowers (9)

6: Wants - in fact, just has to have (5)

7: Do as I say in short retreat (5)

9: Fish spawn upstream in little orifices (3)

13: Fancies and gets hard around (5)

15: Residents back business, copper gasps (9)

16: Broadway show's inane cast (5)

17: Measuring unusual flowers (9)

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

21: Notable piece of animation by English bishop (5)

23: Nothing we have to pay (3)

24: April keeps providing material for a poet (5)

27: Bite and flip over -- one way to win a wrestling match (3)