In a large saute pan, melt butter over medium heat. Add garlic.
Add in shrimp and allow to cook 2-3 minutes. Add in mussels, clams, and white wine. Allow for white wine to cook down about 3-4 minutes, until reduced.
Add clam sauce and cover. Cook for another 5 minutes.
Remove lid and add spaghetti. Lower heat and let sit for 3-5 minutes to allow pasta to soak.