Family prefix (4)

I believe the answer is:

step

(Other definitions for step that I've seen before include "Pest (anag.)" , "Bit of mashed potato maybe" , "Footfall" , "one stage of flight" , "Part of a stairway" .)

I've seen this clue in The New York Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.