Kicks up fuss about energy-saving tariffs (7)
I believe the answer is:
creates
'kicks up fuss' is the definition.
(create can mean to make a fuss or commotion)
'about energy-saving tariffs' is the wordplay.
'about' becomes 'c' (abbreviation for 'circa').
'energy' becomes 'e' (physics symbol as in E=mc2).
'saving' means one lot of letters goes inside another (inserted letters are kept or saved).
'tariffs' becomes 'rates' (both can mean prices).
'e' placed inside 'rates' is 'reates'.
'c'+'reates'='CREATES'
(Other definitions for creates that I've seen before include "Brings into existence" , "Complains" , "coins" , "Makes" , "Generates" .)