cryptic 2640

[creamegg]

1a- study as per usual, with only one university
p???s??

9a- common sense about new place for puzzle
n???l??

5d- blunder as foreman, not reaching conclusion
g???e

17a- author stumped by incomplete service
????????n

22a- limit jump, for certain
?????

[Wharton]

5d gaffe(r)

[WyeDyed]

5d gaffe (r)

[shooty]

perusal

[Lie-in King]

1a Perus(u)al
9a Nonplus - 'nous' (about) 'n(ew) pl(ace)'
5d Gaffe(r)
17a St-evenson(g)
22a Bound - triple meaning

[tommy-h]

perusal,nonplus,gaffe,letterman?

[creamegg]

Is 15a mark twain? book couple put together for american writer? and 13a- another zero needed in academics mathematical work, is this pro(o)f?

Thanks for the rest by the way, im getting there with working cryptics out slowly but surely!

[Lie-in King]

Yes, both of those ^ are correct :-)

[shooty]

proof looks good to me : )