One may be found in a bar surrounded by doubles
I believe the answer is:
'bar surrounded by doubles' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for dartboard that I've seen before include "Target for arrows" , "Pub game equipment" , "It's doubles all round" , "Target found in pubs" .)