Not so contaminated (5)
I believe the answer is:
purer
(Other definitions for purer that I've seen before include "Less adulterated" , "More chaste" , "cleaner" , "more clean" , "Less immoral" .)
I believe the answer is:
purer
(Other definitions for purer that I've seen before include "Less adulterated" , "More chaste" , "cleaner" , "more clean" , "Less immoral" .)