Report commonly supposed to be right (4)
I believe the answer is:
bang
'report' is the definition.
(report can mean a loud noise)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for bang that I've seen before include "Hairstyle" , "A loud report or a collision" , "Slam" , "Sudden sharp noise" , "Completely modern" .)