Fancy Dorothy scoffing beef as standard practice! (9)
I believe the answer is:
orthodoxy
'standard practice' is the definition.
(standard or orthodox way of doing things)
'fancy dorothy scoffing beef' is the wordplay.
'fancy' is an anagram indicator.
'scoffing' is an insertion indicator.
'beef' becomes 'ox'.
'dorothy' with letters rearranged gives 'orthody'.
'orthody' placed around 'ox' is 'ORTHODOXY'.
'as' is the link.
(Other definitions for orthodoxy that I've seen before include "Conventional state" , "Conventionality" , "Conformity" , "Traditional doctrine" , "Position of agreement with conventional standards" .)