@codydub03 Clara was not the first person to summon him. He was summon by a girl who taught Clara how to summon him. So, If you don't know how to summon him directly you can't summon him. I believe.
Actually The disguise worked. It's just someone from his own town showed up and even then at first she wasn't to sure it was him, but some country bumpkin.
what should happen is he should just give up on the disguise now that it is blown.