Robber didn't allow it, we hear (6)
I believe the answer is:
bandit
'robber' is the definition.
(bandit is a type of robber)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for bandit that I've seen before include "Dan bit the robber badly" , "Armed robber in the Wild West" , "Armed outlaw" , "Outlawed robber" , "hood" .)