Related Clues:

• Modify, say, second character in novel, such as Mr. Hyde
• One's second personality
• A friend who's trusted to change and say nothing
• A toy has to soften up Achates
• What psychoanalysis might do for sign of split personality?
• Counterpart of grotesque abridged Gorey tale
• Singer embracing monarch, for example, as bosom pal
• Gloat about guards before getting intimate
• Later, slightly confused, say nothing for close friend
• One virtually geocryptic
• You again?
• Hannah Montana, to Miley Stewart
• Trusted friend's to modify construction kit student rejected
• Clark Kent, to Superman
• Revise, for example, love for Bruce Wayne's other half