All-knowing scion met in travels (10)

I believe the answer is:

omniscient

'all-knowing' is the definition.
(I know that all-knowing can be written as omniscient)

'scion met in travels' is the wordplay.
'travels' is an anagram indicator.
'scion'+'met'+'in'='scionmetin'
'scionmetin' with letters rearranged gives 'OMNISCIENT'.

(Other definitions for omniscient that I've seen before include "All-knowing" , "Knowing everything" .)

I've seen this clue in The Times.

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