Clad means dressed or covered. You might be clad in green velvet and leather. A jewelry box might be clad in ebony with silver carvings.
As it applies to what a person is wearing, clad is the past participle of clothe. If you wanted to talk about the day your friend commanded you to clothe yourself in green and you obeyed, you'd say, "I clad myself in green." Of course, it sounds archaic. Like talking about your shoes by saying shod.
