Stand under a Smith machine bar set at shoulder height and grip it with a clean (overhand) grip. Step back so the bar rests on your front shoulders, keep your chest up and core braced, then lower into a squat by bending your hips and knees. Descend until your thighs are around parallel to the floor, then drive through your heels to stand back up with control.
Log your smith front squat (clean grip) sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.