Bashful around papa over proper form of protection (9)
I believe the answer is:
copyright
'form of protection' is the definition.
'bashful around papa over proper' is the wordplay.
'bashful' becomes 'coy' (I've seen this before).
'around' indicates putting letters inside.
'papa' becomes 'p' (phonetic alphabet: alpha, bravo, charlie etc.).
'over' says to put letters next to each other.
'proper' becomes 'right' ('right' can be a synonym of 'proper'**).
'coy' enclosing 'p' is 'copy'.
'copy'+'right'='COPYRIGHT'
(Other definitions for copyright that I've seen before include "Protection for writer" , "legal protection against piracy" , "Patent" , "control over reproduction" , "control publication" .)