Seven Dwarfs' leader (3)
I believe the answer is:
doc
(Other definitions for doc that I've seen before include "Medic (familiar)" , "Main dish" , "GP (informal)" , "Physician (colloq.)" , "GP (colloq.)" .)
I believe the answer is:
doc
(Other definitions for doc that I've seen before include "Medic (familiar)" , "Main dish" , "GP (informal)" , "Physician (colloq.)" , "GP (colloq.)" .)