Crossword Genius

Greyhound expected to lose? (8)

Ross

I believe the answer is:

underdog

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

'greyhound' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for underdog that I've seen before include "Probable failure" , "One at a disadvantage" , "one not expected to win" , "Least favoured competitor" , "Someone at a disadvantage and likely to lose" .)

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.