Crossword Genius

Less contaminated (5)

Ross

I believe the answer is:

purer

'less contaminated' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for purer that I've seen before include "Less immoral" , "More chaste" , "cleaner" , "more clean" , "Less adulterated" .)

I've seen this clue in the Thinks.com, the Universal, the Jonesin', The Washington Post, the USA Today, the Jonesin Crosswords and The Washington Post Sunday.
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