Are such sports in only one part of the country? (5)
I believe the answer is:
field
'country?' is the definition.
The answer and definition can be both groups as well as being singular nouns.
Perhaps there's a link between them I don't understand?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for field that I've seen before include "Piece of farmland" , "Area of knowledge, for game" , "his nocturnes, perhaps?" , "Sphere of endeavour" , "Realm" .)