Crossword Genius

Involving clearly defined and opposing principles (5,3,5)

Ross

I believe the answer is:

black and white

(Other definitions for black and white that I've seen before include "An old box?" , "Monochrome - print" , "not admitting any middle ground" , "(Of situation) having clear issues" , "Old (TV); stark contrasts" .)

I've seen this clue in The Guardian.
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