Keep colour of suit dark, though not necessarily black. Navy, charcoal, brown are good. Neutral beige and cream are acceptable choices, too. Team suit with a simple round or v-neck blouse. Choose cotton or silk.
Material is important, invest.
Alternatively a knit top is suitable, but not one that clings or is transparent. Stick to white or light coloured tops. Don't wear prints. Flesh toned pantyhose is preferred. Sheer, not opaque, black if it matches the outfit.