Ways of upsetting the mods (7)
I believe the answer is:
methods
'ways' is the definition.
(method is a kind of way)
'upsetting the mods' is the wordplay.
'upsetting' is an anagram indicator.
'the'+'mods'='themods'
'themods' is an anagram of 'METHODS'.
'of' acts as a link.
(Other definitions for methods that I've seen before include "Procedures, systems" , "Procedure to accomplish something" , "Techniques" , "Procedures for accomplishing" .)