Busy buzzers ... and letters found at the start of every clue in this puzzle

BEES

Think of striped insects known for their hives and honey, whose name also starts a common phrase meaning "very active."

This clue plays on two meanings of "busy buzzers"—first, it hints at bees, which buzz around busily, and second, it points to the letter "B" at the start of every clue in the puzzle. The word "letters" confirms you’re looking for a short word, not just the insect itself. Since "B" sounds like "bee," the answer ties both ideas together neatly.