God of youth, originally? (4)

I believe the answer is:

thor

'god' is the definition.
(Norse god of thunder)

'of youth originally?' is the wordplay.
'of' indicates a hidden word.
'THOR' is hidden in the letters of 'youth originally'.

(Other definitions for thor that I've seen before include "Norse hammer-wielding god" , "Comic superhero" , "Norse god of war" , "Norse deity" , "Scandinavian thunder-god" .)

I've seen this clue in the Evening Standard.

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