Crossword Genius

Mystery of Vietnam GI never going back (6)

Ross

I believe the answer is:

enigma

'mystery' is the definition.
('enigma' can be a synonym of 'mystery')

'of vietnam gi never going back' is the wordplay.
'of' indicates the answer is hidden within the clue.
'going back' is a reversal indicator.
'amgine' is hidden in the letters of 'vietnam gi never'.
'amgine' reversed gives 'ENIGMA'.

(Other definitions for enigma that I've seen before include "Something mysterious and puzzling" , "Title of Elgar's set of variations" , "Puzzling person/thing" , "Puzzle of gamine (6)," , "Mysterious person/thing" .)

I've seen this clue in The Telegraph.
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