Really struggled this week and would appreciate an explanation for the following.
10a. As is nacre, surprisingly (7). Answer ARSENIC which is obviously an anagram.
13/17. Proverb striking one SAS operative-see, Moody's changing (8,2,2,8,4). Answer HANDSOME IS AS HANDSOME DOES. Striking = handsome, one SAS = IS AS but that is where I get lost.