Are you stumped by this chumming crossword clue?

The answer to the crossword question “The ‘chum’ of chumming is BAIT” is simply stating that the term “chumming” refers to the practice of using bait to attract fish. “Chum” in this context refers to a mixture of fish parts, blood, or other strong-smelling substances that are thrown into the water to attract fish. The purpose of chumming is to create a feeding frenzy that ultimately results in catching more fish. Therefore, the answer to this crossword question is that the bait used in chumming is “BAIT.”