One of the Smurfs
I believe the answer is:
papa
'one of the smurfs' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for papa that I've seen before include "Father; P (radio comms.)" , "The old man" , "Father; letter P" , "Mama's other half?" , "Comms code for 'P'" .)