A tight dress/skirt that is a little short. You want him to want to see more. A well-placed slit can show the tops of stockings or thigh-highs. Again, not revealing too much. The top does not have to be too low cut, but certainly not up to the neck, LOL like church girl. Again, make him want to see more and do the work to get the privilege.
Then, the most important is to have the makeup done that emphasizes your eyes. Why???? You are going to want to give the flirty and maybe the "fuck me" look. You also have to be prepared to have the "go away" look in case the guy turns into an arrogant dork.