Royalty money (9)
I believe the answer is:
sovereign
I believe this is a double definition.
'royalty' is the first definition.
(thesaurus)
'money' is the second definition.
(I have seen 'Old money' mean 'sovereign' so perhaps 'money' could also mean 'sovereign')
(Other definitions for sovereign that I've seen before include "Head of state" , "13 across -- coin" , "Her Maj?" , "Supreme ruler" , "Monarch - old coin" .)