if you dont have a braze on clamp on your bike frame, then you'll need one of these clamps to attach your shiny new front derailleur
this does the job fine. There are probably other manufacturers out there that are no doubt cheaper and equally as good, but this has campag stamped on the front so it matches the rest of your your campag gear (there's probably a velominati rule on this sort of thing for the "grupos" out there)