Robber prohibited something, we hear (6)
I believe the answer is:
bandit
'robber' is the definition.
(bandit is a type of robber)
'prohibited something we hear' is the wordplay.
I cannot really understand how this works, but
'something' could be 'it' (both can refer to an object) and 'it' is located in the answer.
The remaining letters 'band' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bandit that I've seen before include "Dan bit the robber badly" , "Violent outlaw" , "Violent robber" , "Member of a gang of robbers" , "(One-armed?) outlaw" .)