Great, perhaps even regal (5)

I believe the answer is:

large

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'great' is the definition.
('large' can be similar in meaning to 'great')

'perhaps even regal' is the wordplay.
'regal' anagrams to 'LARGE'.
Though, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for large that I've seen before include "Big - 5 down (anag)" , "Chunky" , "Ample" , "Copious" , "Lager (anag.)" .)

I've seen this clue in the Evening Standard.

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