make more pure (6)
I believe the answer is:
refine
(Other definitions for refine that I've seen before include "Make pure" , "Remove impurities from (eg, metals)" , "Hone" , "Remove impurities as from oil" , "Purify or make more cultured" .)
I believe the answer is:
refine
(Other definitions for refine that I've seen before include "Make pure" , "Remove impurities from (eg, metals)" , "Hone" , "Remove impurities as from oil" , "Purify or make more cultured" .)