1. Humble petitioning (10)
S???J?A?C?
2. Amongst other things (5,4)
I???H?L?A
6. Pertaining to rainfall (6)
H?E?A?
8. Brisk dance in duple time from the Auvergne (7)
??U?R??
9. Pierre's seal (5)
????U
10. Land between two rivers, a "cradle of civilization" (11)
????P???M?A
20. Skiffle instruments (7)
?A?J?E?
23. Sea pie (6-7)
O?S?????T?H?R
25. Formerly the capital of Mossi empire (11)
???????????
28. A type of semiconductor device useful in voltage limiting circuits (5,5)
?????D?O?E
32. Apparently Dead (9)
????A?O?D
34. A hard substance growing on the inside of a horse's knee (7)
????L??
38. A small civet, Viverricula indica (5)
?????
I don't think that you can be getting much satisfaction out of doing this crossword. All of these answers can be found by Google and the other sites that I have posted on your previous question.
I usually do that. I usually only have about 8 or 9 clues left that I've really struggled with. However, today I couldn't bear the thought of trawling throught the Internet. However, jimjools has listed some websites that he believes will help. So next month I will use them too before coming here