Crossword Genius

Self-satisfied with what’s holding the teeth back (4)

Ross

I believe the answer is:

smug

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

'self-satisfied' is the definition.
(synonyms)

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

Can you help me to learn more?

(Other definitions for smug that I've seen before include "Superior" , "Self-satisfied, complacent" , "Conceited and self-satisfied" , "Self-righteously complacent" , "Full of oneself" .)

I've seen this clue in the Sydney Morning Herald.
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.