In a large pot on medium high heat, drizzle in a touch of olive oil. Add the chili flakes, sausage, garlic and clams and cook for 5 minutes.
Add the saffron and deglaze with white wine. Cook for 2 minutes, then add the chicken broth. Adjust seasoning with salt and pepper. Reduce by half, about 3 to 4 minutes.
Add the pasta to water and cook for 2 minutes. Remove the pasta and add to clams.
Continue to reduce the sauce, stirring pasta to release starch to help thicken the sauce. Reduce heat to medium, add butter and stir. If the sauce becomes too thick, add a touch of pasta water to thin out. Fold in the parsley and season one last time with salt and pepper, if needed. Enjoy!