Crossword Genius

Actual capital of mythical royal domain (5)

Ross

I believe the answer is:

realm

'royal domain' is the definition.
(I've seen this before)

'actual capital of mythical' is the wordplay.
'actual' becomes 'real' ('real' can be a synonym of 'actual').
'capital of' says to take the initial letters.
The initial letter of 'mythical' is 'm'.
'real'+'m'='REALM'

(Other definitions for realm that I've seen before include "Knowledge base" , "Empire - state" , "Kingdom could be lamer" , "Kingdom, or field of activity" , "Province" .)

I've seen this clue in The Telegraph.
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