Parental guidance needed about current nature of Peppa (3)
I believe the answer is:
pig
'nature of peppa' is the definition.
(Peppa Pig is a cartoon character)
'parental guidance needed about current' is the wordplay.
'parental guidance' becomes 'pg' (film rating).
'needed about' indicates putting letters inside.
'current' becomes 'I' (symbol for electric current).
'pg' enclosing 'i' is 'PIG'.
(Other definitions for pig that I've seen before include "Greedy eater" , "Glutton" , "Farmyard animal" , "Boar or sow" , "Sow, perhaps" .)