Look embarrassed, not proud (5)

I believe the answer is:

flush

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

'look' is the definition.
The definition and answer can be both states of affairs as well as being singular nouns.
Perhaps you can see a link between them that I don't see?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for flush that I've seen before include "with a load of cash" , "Rich" , "Poker hand of same suit" , "Pull the chain - rush of emotion - good poker hand - having plenty of money" , "winning hand at poker" .)

I've seen this clue in the Evening Standard.

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.