Fume (over)

The answer to the crossword question “Fume (over)” is STEW. This word refers to a dish made by simmering meat, vegetables, and other ingredients in a liquid. In the context of the crossword, “fume” suggests a state of anger or frustration, and “stew” is a fitting synonym for this emotion. Therefore, the answer to the clue is STEW, which captures the idea of simmering with anger or frustration.