Have an iron prepared for old George (10)
I believe the answer is:
hanoverian
'old george' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'have an iron prepared' is the wordplay.
'prepared' indicates an anagram.
'have'+'an'+'iron'='haveaniron'
'haveaniron' anagrammed gives 'HANOVERIAN'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for hanoverian that I've seen before include "Eg, like George I" , "Any sovereign from George I to Victoria" .)