Crossword Genius

The whole world finds it illuminating (8)

Ross

I believe the answer is:

sunlight

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This could be a double definition.

'the whole world' is the first definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'it illuminating' is the second definition.
The definition suggests a singular noun which matches the answer.

'finds' is the link.

Can you help me to learn more?

(Other definitions for sunlight that I've seen before include "Form of illumination" , "What's illuminating, naturally" , "port?" , "Ray" , "Solar rays" .)

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