1: Nits are possibly more unpleasant (7)
5: One young lady who is out of order (5)
7: See, you are a cad. (3)
8: Shock with exclamations while mounting horse (9)
9: Nothing we have to pay (3)
10: As in 'Lee goes back to the drawing board' (5)
11: Attack raise with no return (3,4)