This is the 3459th most frequent German word.
klagenfurter
"Klagenfurter" refers to a person from Klagenfurt, a city in Austria.
In this sentence, "Klagenfurter" is used as a noun to refer to a person who is from the city of Klagenfurt, Austria.
Der Klagenfurter bewundert die Aussicht vom Berg.
The Klagenfurter admires the view from the mountain.
Here, "Klagenfurter" acts as an adjective to describe something that originates from Klagenfurt, specifically a culinary dish.
Ein typisches Klagenfurter Gericht ist die Kasnudeln.
A typical Klagenfurt dish is the Kasnudeln.
In this context, "Klagenfurter" is used adjectivally to describe the history associated with Klagenfurt.