Define "crony capitalism" in terms of the traits it has that no other form of capitalism.
It's a political buzzword that refers to government interventionism in favor of various interest groups (the "cronies"). Not a precise term, to be sure, but you get the point. I suppose the reason "capitalism" gets added on is because it typically refers to situation in which the government takes the place of private markets actors, often capitalists. For example, in the case of agricultural subsidies, the government has taken the place of private investors and has poured huge amounts of capital into the agricultural industry that otherwise would not have been invested. Or, more likely, "crony capitalism" just sounds catchier to people and is better at stimulating voters.