A manic nun mithered a northerner (9)
I believe the answer is:
mancunian
'a northerner' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'a manic nun mithered' is the wordplay.
'a manic nun' can be anagrammed to 'MANCUNIAN'.
But, I am not sure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for mancunian that I've seen before include "Native of Manchester" , "citizen" .)