Answer: thorne

AnswerCrossword Clue
THORNE

Smith who wrote 'Topper"

THORNE

Smith, the novelist, creator of Topper.

THORNE

Anthony Trollope's "Doctor ...."

THORNE
"Topper" creator, ... Smith.
THORNE
Author Smith of "Topper" fame
THORNEActress Courtney -- -Smith
THORNEPhysicist Kip