Hi again Poosahib,
This is getting embarrasing.
Esser doesn't mean "right to exist" it just means "to be" as some sort of linking thing in Linguitics.
so; to be, classic = esser
(read from the)Right = backwards (in across clues) = resse.
resse inside Dr = Dresser.
third and final answer (I'd bet that's what you're all hoping).