Drink on me is of highest quality (7)

I believe the answer is:

supreme

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

'is of highest quality' is the definition.
I can't tell whether this definition defines the answer.

'drink on me' is the wordplay.
'drink' becomes 'sup' (to sup is to drink).
'on' becomes 're' (regarding).
'sup'+'re'+'me'='SUPREME'

Can you help me to learn more?

(Other definitions for supreme that I've seen before include "God" , "Best of all" , "Crowning" , "over the top" , "Highest in rank - incomparable" .)

I've seen this clue in The Times.

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.