Clue: Pompous dwarf's question about his identity? (5)
Answer: MEDOC
Explanation: definition: ? …Chambers lists Médoc as a wine named after a region of France – I can't link this to "Pompous" or find a different meaning 
wordplay: DOC is a "Pompous dwarf" in Disney's *Snow White and the Seven Dwarfs*, and might ask 'Me, Doc?' about his own identity