Answer:

mousetrap

Answer	Crossword Clue
MOUSETRAP	Better product, perhaps
MOUSETRAP	"Tom and Jerry" prop
MOUSETRAP	Agatha Christie play, with "The"

MOUSETRAP	Board game with cheese-shaped tokens
MOUSETRAP	Inventors often try to build a better one
MOUSETRAP	Board game where players win pieces of cheese
MOUSETRAP	Danger for Stuart Little
MOUSETRAP	Kids' board game with a Rube Goldbergian device
MOUSETRAP	It may be loaded with cheese
MOUSETRAP	Mickey's mouth?
MOUSETRAP	Christie play, with "The"

MOUSETRAP	Spring is here
MOUSETRAP	Pest-control device
MOUSETRAP	Part of a famous quotation from Emerson.
MOUSETRAP	Key word of aphorism attributed to Emerson.
MOUSETRAP	Emersonian symbol.
MOUSETRAP	Sometime household necessity.
MOUSETRAP	Fake opening at football.
MOUSETRAP	Football maneuver.

MOUSETRAP	Long-running Christie play, with "The"
MOUSETRAP	Mickey's nemesis?
MOUSETRAP	Cheese place
MOUSETRAP	Inventors may try to build a better one
MOUSETRAP	Mickey's mouth or greatest fear
MOUSETRAP	Some try to build a better one