Big impression made by bad diver (6)

I believe the answer is:

splash

I'm a little stuck... Click here to teach me more about this clue!

'big impression' is the definition.
(making a splash)

I don't understand how the rest of the clue works.

(Other definitions for splash that I've seen before include "sensational story" , "Big newspaper feature" , "Prominent headline" , "Lead news story" , "Cause water to fly about in drops" .)

I've seen this clue in The Daily Express.

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.