Smurf with a white beard (4)
I believe the answer is:
papa
'smurf with a white beard' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for papa that I've seen before include "one after Oscar" , "Father; letter P" , "The old man" , "Daddy]" , "Comms code for 'P'" .)