In SouthNarc's Edged Weapons Overview (EWO) class he goes how strike with a knife held in reverse/sabre grip and edge in/out. Someone even brought a push dagger trainer and he went over that for a little bit. Some of the techniques covered lend themselves well to the design of Clinch Pick, but it certainly isn't a class devoted to it.
Edit to Add: And what everyone else said, because I'm slow.