Online nuisance (5)

I believe the answer is:

troll

(Other definitions for troll that I've seen before include "unwanted contributor to site?" , "Fish - cave-elf" , "Fish; goblin" , "online commenter" , "Folklore monster" .)

I've seen this clue in The Sun and 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.