In a large skillet, heat 1 tablespoon olive oil over medium heat. Add sausage and cook until browned, about 5 minutes. Remove sausage to a plate or bowl and set aside.
In the same skillet you cooked the sausage in (don't wipe it out), add onion, garlic, and jalapeño and cook, stirring, until softened, about 2 minutes. Add more olive oil if necessary.
While sausage and aromatics are cooking bring a large pot of salted water to a boil. Add linguine to pot and cook until just before it reaches al dente (it will cook a bit longer when added to the skillet).
Add clams and hard cider or wine to skillet and bring to a simmer. Add lime juice and zest and cover skillet. Cook, until clams open, about 5 minutes. Be sure to discard any clams that don't open.
Drain pasta and add to skillet, along with butter. Toss with sausage and parsley and season with salt and pepper as desired.