Both sides on board admitting no middle ground (5,3,5)
I believe the answer is:
black and white
'ground' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I don't see?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for black and white that I've seen before include "Clearly written down - admitting no middle way" , "(Of situation) having clear issues" , "Involving clearly defined issues" , "Not in colour" , "not admitting any middle ground" .)
