Illustrious old money (5)
I believe the answer is:
noble
This could be a double definition.
'illustrious' is the first definition.
(I've seen this before)
'old money' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
Can you help me to learn more?
(Other definitions for noble that I've seen before include "fine" , "Imposing, magnificent" , "Former gold coin" , "Maybe count" , "Honourable or of high rank" .)