Crossword Genius

Clean horribly nasty air (8)

Ross

I believe the answer is:

sanitary

'clean' is the definition.
(I've seen this before)

'horribly nasty air' is the wordplay.
'horribly' indicates an anagram (a horribly wrong version of the letters).
'nasty'+'air'='nastyair'
'nastyair' with letters rearranged gives 'SANITARY'.

(Other definitions for sanitary that I've seen before include "Relating to health" , "Astray in hygienic way" , "Any sitar (anag.)" , "Hygienic and clean" , "Free from filth and pathogens" .)

I've seen this clue in The Irish Times.
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