The crossword solution for the term 'Santa Spoiler' is SOOT. SOOT is a black or dark gray powdery or flaky substance consisting mainly of amorphous carbon, produced by the incomplete combustion of coal, oil, wood, or other organic matter. It is often found in the chimneys of homes that use wood-burning stoves or fireplaces. In the context of Santa Spoiler, it is likely referring to the SOOT that is left behind from Santa's chimney when he visits homes on Christmas Eve.