Answer:

tubby

Answer	Crossword Clue
TUBBY	Tuba in a children story
TUBBY	Tuba in a children's story
TUBBY	".. little cubby" (Winnie-the-Pooh descriptor)

TUBBY	Fat and clumsy.
TUBBY	Short and fat.
TUBBY	Fat: Colloq.
TUBBY	Roly-poly
TUBBY	Short and fat
TUBBY	Rather overweight
TUBBY	Short and plump
TUBBY	Corpulent