Crossword Genius

Stray from proper rectitude (3)

Ross

I believe the answer is:

err

'stray' is the definition.
(synonyms)

'from proper rectitude' is the wordplay.
'from' indicates a hidden word.
'ERR' is hidden within 'proper rectitude'.

(Other definitions for err that I've seen before include "Leave the straight and narrow" , "do something you shouldn't" , "Be mistaken" , "Boob" , "Make a wrong move" .)

I've seen this clue in the Evening Standard.
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