Fabulous supporter of royalty (7)
I believe the answer is:
unicorn
This clue might be a double definition.
'fabulous supporter' is the first definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'royalty' is the second definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for unicorn that I've seen before include "Mythical beast like horned horse" , "Animal of fable" , "Mythical animal with one horn" , "Imaginary creature with one horn" , "Singularly horny creature of fantasy" .)