Crossword Genius

Swimmer good with two others (8)

Ross

I believe the answer is:

grayling

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

'swimmer' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for grayling that I've seen before include "Butterfly" , "Fish of the salmon family" , "Catch" , "Salmonoid fish" , "Fish - philosopher" .)

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.