Lout not getting round woman's odd aunt who's a follower of German reformer (8)
I believe the answer is:
lutheran
'a follower of german reformer' is the definition.
I can't judge whether this definition defines the answer.
'lout not getting round woman's odd aunt' is the wordplay.
'lout not' becomes 'l' (I am not sure about this - if you are sure you should believe this answer much more).
'getting round' means one lot of letters goes inside another.
'woman's' becomes 'her' (belonging to a woman).
'odd' indicates an anagram.
'aunt' with letters rearranged gives 'utan'.
'her' put inside 'utan' is 'utheran'.
'l'+'utheran'='LUTHERAN'
'who's' is the link.
Can you help me to learn more?
(Other definitions for lutheran that I've seen before include "it could be Bach" , "Type of Protestant" , "Anti-Catholic" , "Of the Protestant Reformation" , "Protestant church member" .)