Seaside sweet – fish – swing (4)

I believe the answer is:

rock

(Other definitions for rock that I've seen before include "musical genre?" , "Edinburgh - -" , "See 17" , "Large stone - type of music" , "to soothe baby" .)

I've seen this clue in The Guardian.

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.