Yesterday evening, with just two unfinished, crossing answers, I was beginning to think I could count myself a Graduate of the School of Crossworders, but I'm afraid I haven't quite made it yet.

Going for the 15 down answer by putting in letters, I thought it was probably VIBRATED, but, sad to say, it was only when I googled 22 across just now that the T of DOTARD confirmed this. But it is finished!
22 across: Cheat thanks Romeo with daughter who's a feeble-minded person (6)
Letters: D - - - R -
15 down: Thrilled lout was in contention outside (

Letters: - I - R - - - D
I'm not sure why 'dotard' is right though.
ETA: I realised D for 'daughter', and I suppose TA for 'thanks' ...