All answers are occupations past and present. I've only about a week left to complete this and need help with quite a few, I'm afraid.
4. Sack the boxer (11)
11. Ring Monroe? (10)
17. He's mean, chic (8)
19. Adder in the grass (4,10)
28. Doesn't know his twelve times table (5)
31. The piper's man finds the way (9)
33. He's the front runner (7)
40. Sees all before him (8)
42. Presenter of medals (9)
45. Mrs Bloggs, Mrs. Bell. Mrs Blank (7) (mrs bell underlined)
47. Figaro (6)
50. Leading craftsman ??(7)
Any help with answers or hints for answers very much appreciated.
50 could be Artisan, depends how cryptic the clues are. Usually in crossword clues any reference to a craftsman the answer is Artisan. Artisans are usually at the top end of skill in their profession.