Sovereign on flag, an individual from western Europe (8)
I believe the answer is:
irishman
'individual from western europe' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?
'sovereign on flag an' is the wordplay.
'sovereign' becomes 'hm' (I can't explain this - if you can you should give a lot more credence to this answer).
'on' is a charade indicator (letters next to each other).
'flag' becomes 'iris' (type of iris flower).
'hm' put after 'iris' is 'irishm'.
'irishm'+'an'='IRISHMAN'
Can you help me to learn more?
(Other definitions for irishman that I've seen before include "islander" , "National" , "Casement possibly" , "European" , "Eg, Dublin male" .)