Crossword Genius

Molecular scientist may use this — only he cannot go wrong (14)

Ross

I believe the answer is:

nanotechnology

'molecular scientist may use this' is the definition.

'only he cannot go wrong' is the wordplay.
'wrong' indicates an anagram.
'only'+'he'+'cannot'+'go'='onlyhecannotgo'
'onlyhecannotgo' anagrammed gives 'NANOTECHNOLOGY'.

I've seen this clue in The Guardian.
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