C1 US specialty a product that is extremely good in a particular place(地方)特产
Oysters are a local speciality/a speciality of the area.牡蛎是当地的特产。
Paella is a speciality of the house (= a food that is unusually good in a particular restaurant).西班牙杂烩菜饭是那家饭馆的招牌菜。