Fine particles (4)
(Other definitions for sand that I've seen before include "Grains by the sea" , "woman writer Chopin loved" , "Hourglass particles" , "Beach constituent" , "Fine stone particles" .)
(Other definitions for bust that I've seen before include "Broken - bankrupt - sculpture" , "Chest; bankrupt" , "Head-and-shoulders sculpture" , "Penniless" , "Broke (Sl.)" .)