Possible Clues:

• Bashful about skin lump that's blackish
• Anyhow, why's the man on the inside so dark-skinned?
• Dark pledge: those people must expel all English
• Dark of complexion
• Embarrassed about growth getting dark
• Dark and diffident about a skin blemish
• Brown hesitant about growth
• Dark complexioned
• Dark-coloured blemish one's reluctant to talk about
• Dark pitch masking blemish