Crossword Genius

The lighter side of chess (5)

Ross

I believe the answer is:

white

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This could be a double definition.

'the lighter' is the first definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?

'side of chess' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's a link between them I don't understand?

Can you help me to learn more?

(Other definitions for white that I've seen before include "Chess player moving first" , "Pallid" , "Outer part of egg" , "Having pink skin" , "Opponent of six dn (chess)" .)

I've seen this clue in The Globe and Mail.
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