The crossword solution for the term 'SIMMER, AS ANGER' is 'STEW'. This term is used to describe a situation in which a person's anger is slowly building up over time. It is similar to boiling a pot of STEW, where the heat is gradually increased until the STEW is cooked. The term is often used to describe a situation in which a person is slowly becoming more and more angry, but has not yet reached the boiling point.