Escuan, in 15ac the misprint is the 4th letter of "leaner" but I don't understand how the clue works. in 38 dn the answer sounds like ("outspoken") another word for dandy and the misprint is the 3rd letter of "post".
I think that in 25 across the second letter of snubbed is incorrect and this is one of clues that omits a letter of the solution. In 26 across "powerful" gives the 2nd, 3rd and 4th letters of the solution. The other 2 letters are "non-contiguous". In 20 across the 3rd letter of "life" is the misprint, not sure how the rest of the clue works.