Dragon's den by the sea? (8,5)
I believe the answer is:
boarding house
This clue could be a double definition.
'dragon's den' is the first definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'sea?' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'by the' is the link.
Can you help me to learn more?
(Other definitions for boarding house that I've seen before include "Establishment renting rooms" , "Place providing food and lodging for paying guests" , "pension" , "Lodgings providing meals" , "Where some scholars live" .)