Spic-and-span (8)
I believe the answer is:
spotless
'spic-and-span' is the definition.
(synonyms)
This is all the clue.
(Other definitions for spotless that I've seen before include "Immaculate" , "Irreproachably clean" , "Without a mark, completely clean" , "Above reproach - perfectly clean" , "How Lady Macbeth wanted to be" .)