Treat in a way that could damage staff name (9)
I believe the answer is:
manhandle
'treat in a way that could damage' is the definition.
The definition and answer are not the same part of speech.
'staff name' is the wordplay.
'staff' becomes 'man' (manning is a kind of staffing).
'name' becomes 'handle'.
'man'+'handle'='MANHANDLE'
Can you help me to learn more?
(Other definitions for manhandle that I've seen before include "Knock around" , "Give rough treatment to" , "Push (someone) about roughly" , "Treat roughly, or move by human effort alone" , "Mistreat" .)