I think these are correct but would appreciate help with the parsing.......
13a. Kind to offer information of no use (5) - GENUS (Kind) - I think 'Information' might be GEN but can't see the rest.
35a. Catch Lot's wife for one, falling short, looking back (6) - ENTRAP (Catch) - it looks like 'wife for one' = PARTNE(r) (cut short & 'back'), but I can't see the relevance of 'Lot'.
36a. Prime requirement for person in race? (5) - SPEED? would fit the def. (sort of), but it's not cryptic so I think I'm missing something.
52a. Cleared up as something might be after evening session (6,3) - IRONED OUT (Cleared up) - Why 'after evening session'?
6d. One who has got to 'excel' from what we hear? (12) - NONAGENARIAN - I think it's 'to 'excel' = 2XL but that equals 80 and 'Nonagenarian' is 90 - 100 so I'm missing something.
39d. Moving stuff conveyed by a line (9) - TRAINLOAD? - Don't get this at all.
4d. One experimenting with the chemical compound - he passes out (6) - TESTER? - Again, don't see any of it.