GP (6,6)
'gp' is the definition.
(family doctor is a kind of gp)
This is the entire clue.
'gp' is the definition.
(I've seen this in other clues)
This is all the clue.
(Other definitions for doc that I've seen before include "Medical practitioner (abbr)" , "Disney dwarf" , "Medic (colloq.)" , "scaled-down version of GP" , "Medic (familiar)" .)