If its the one I am thinking about in the handle, DRILL it out. Retap. I replace all clutch heads. I use some for tag mounting bolts. Other than that ,they are useless. Those screw heads are a sore subject.
~ BD. "You won't find me in an old folks home" Pioneer Florida Cracker 1958 Apache Stepside 1958 Apache 1/2 ton Panel 1959 Apache 1/2 ton Panel