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Travelling light? (8,4)

Ross

I think it could be either:

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7

8,4

shooting star

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This might be a double definition.

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

'light?' is the second definition.
(I know that shooting star is a type of light)

Can you help me to learn more?

(Other definitions for shooting star that I've seen before include "Annie Oakley, for example" , "on which you'd make a wish?" , "Bright meteor" , "possibly a streaker?" , "Top toxophilite" .)

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