Crossword Genius

Imperial pint, maybe making a comeback (5)

Ross

I believe the answer is:

regal

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

'imperial' is the definition.
(I know this)

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

Can you help me to learn more?

(Other definitions for regal that I've seen before include "Grand and imposing" , "Magnificent, dignified" , "Kingly or queenly" , "befitting a king" , "Royal - 5 down (anag)" .)

I've seen this clue in The Independent.
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