Big regal characters ordered out (5)

I believe the answer is:

large

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

'big' is the definition.
(I know that big can be written as large)

'regal characters ordered out' is the wordplay.
'regal' anagrams to 'LARGE'.
However, I'm not clear how this is indicated.

Can you help me to learn more?

(Other definitions for large that I've seen before include "Lager (anag.)" , "Comprehensive" , "Big - 5 down (anag)" , "At which criminals possibly are free" , "Generous" .)

I've seen this clue in The Irish Independent.

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