He asked if she had any 'skeletons in her closet' that might affect her political campaign.
She's a 'closet' racist. [=she does not want people to know that she is a racist]
The manager 'was closeted' with one of her employees for several hours.
(..) - He's dying. his life is my blood, Spider-Man's blood. As far as I know, if I gave it to him, it could kill him. I'm saying worse. This is the maintenance closet, Gwen. This is the most cliche hiding place you could have chosen. I'm...sorry. This is the stupidest hiding place. (..)2014 The Amazing Spider-Man 2