This Homemade Clutch Pedal Stirrup provided the answer for a farmer who has difficulty (because of a knee problem) in lifting his foot high enough to step on that pedal. Needing to press it down only about an inch to release the clutch, a horse stirrup was attached to the pedal with hose clamps so that it hangs down beneath it. Slipping his boot into the stirrup allows the farmer to depress the pedal that 1 inch without having to lift his knee at all.