Fabulous supporter of royalty (7)
I believe the answer is:
unicorn
This might be a double definition.
'fabulous supporter' is the first definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'royalty' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'of' is the 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" .)