Crossword Genius

American friend has gone round the globe (3)

Ross

I believe the answer is:

orb

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'the globe' is the definition.
(synonyms)

I cannot understand how the rest of the clue works.

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(Other definitions for orb that I've seen before include "Item of insignia" , "Heavenly body" , "Sphere - eye" , "Ring" , "Jewelled ornament" .)

I've seen this clue in The Times.
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