Get beer up fit for a king (5)

I believe the answer is:

regal

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'fit for a king' is the definition.
(I've seen this before)

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

(Other definitions for regal that I've seen before include "Kingly or queenly" , "Royal - lager (anag)" , "Fit for a monarch" , "Kingly glare?" , "fit for the Queen" .)

I've seen this clue in The Irish Independent.

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