CEO & Biden tampered with energy submission (9)
I believe the answer is:
obedience
'submission' is the definition.
(I know that obedience is a type of submission)
'ceo biden tampered with energy' is the wordplay.
'tampered with' is an anagram indicator.
'energy' becomes 'e' (physics symbol as in E=mc2).
'ceo'+'biden'='ceobiden'
'ceobiden' is an anagram of 'obedienc'.
'obedienc'+'e'='OBEDIENCE'
(Other definitions for obedience that I've seen before include "Doing what someone tells you" , "Compliance with an order or law" , "dutiful behaviour" , "The following of orders" , "Vow" .)