Can anyone help with the following cryptic crossword clues:
8A Not responsible - by order (8) (- - E - - - - -)
6D Could be a straggling urban expansion so sit up straight (6) - 2nd letter is 5th of 8A
23A Misrepresent a dance with an expected ending (5) (- - - S - )
20D Neither one thing nor the other, no good for the race (6) (- - - - E -)