No magical individual in Hogwarts had finally brought in prohibited items (8)
I believe the answer is:
smuggled
'brought in prohibited items' is the definition.
The answer and definition can be both to do with ownership as well as being past participle verbs.
Perhaps they are linked in a way I don't understand?
'no magical individual in hogwarts had finally' is the wordplay.
'no magical individual' becomes 'muggle' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' indicates putting letters inside.
'finally' says to take the final letters.
The final letters of 'hogwarts had' are 'sd'.
'muggle' placed into 'sd' is 'SMUGGLED'.
Can you help me to learn more?
(Other definitions for smuggled that I've seen before include "Ran contraband" , "Illegally distributed" , "avoided duties" , "Brought goods into country illegally" , "Moved illicitly" .)