All Minis until the Verto setup in about 1982 used this long clutch arm. The current version is stronger than the original one, which was prone to fatigue and bending. The arm often needs replacement due to enlargement of the pivot pin hole and particularly wear or bending of the ball at the lower end. Reproduction part.
See also clevis pins CLZ0628 and CLZ0518. These also wear and any excess clearance leads to deteriorated clutch action.