Not sure that's completely fair on Clarke. We've had Devlin x 2, Considine and Mackenzie all called up. As was Bowie when he was playing for dross like Hibs. Let's not forget Brophy has a cap too.
I'm assuming he wanted to look at a winger with Doak having legs made from toilet roll tubes and Curtis has a bit of form. He also usually takes a youngster along with the squads to give them experience in case they turn out to be good, which I think is a good thing. I'm guessing most other youngsters are sitting on the bench of some English second string side. Can't think of another wide player that would be better to have.