Shake head, you and me getting reported (7)
I believe the answer is:
concuss
'shake' is the definition.
(concussing is a kind of shaking)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for concuss that I've seen before include "Completely stun" , "Cause a brain injury" , "Stun with heavy blow" , "Inflict (temporary) damage on the brain" , "Knock it on the head!" .)