Classical guitarist and swimmer (5)

I believe the answer is:

bream

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

'swimmer' is the definition.
(bream is a kind of fish)

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

(Other definitions for bream that I've seen before include "River fish" , "Amber (anag) - fish" , "Swimmer" , "Carp relative" , "Fish - English guitarist" .)

I've seen this clue in The Sun.

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.