Invested hospital department with new duster (9)
I believe the answer is:
entrusted
'invested' is the definition.
The answer and definition can be both to do with ownership as well as being past participle verbs.
Perhaps there's an association between them I don't understand?
'hospital department with new duster' is the wordplay.
'hospital department' becomes 'ENT' (Ear, Nose and Throat).
'with' says to put letters next to each other.
'new' is an anagram indicator.
'duster' with letters rearranged gives 'rusted'.
'ent'+'rusted'='ENTRUSTED'
Can you help me to learn more?
(Other definitions for entrusted that I've seen before include "invested with responsibility" , "Placed (into someone's care)" , "committed" , "Gave responsibility to" , "Given for safekeeping" .)