Answer:

speedy

Answer	Crossword Clue
SPEEDY	Quick
SPEEDY	The Alka-Seltzer boy
SPEEDY	Alka Seltzer spokesman

SPEEDY	Rapid
SPEEDY	Prompt
SPEEDY	PDQ
SPEEDY	Fast
SPEEDY	Not a slowpoke
SPEEDY	Expeditious
SPEEDY	Swift
SPEEDY	Brisk

SPEEDY	Alka-Seltzer spokesman
SPEEDY	Gonzales known as "the fastest mouse in all Mexico"
SPEEDY	Fleet-footed
SPEEDY	Like the Flash
SPEEDY	Alka-Seltzer pitchman
SPEEDY	.. Gonzales (cartoon mouse)
SPEEDY	Quite fast
SPEEDY	Very fast

SPEEDY	Fast-acting
SPEEDY	Efficient
SPEEDY	Fleet
SPEEDY	Velocious.
SPEEDY	Prompt.
SPEEDY	Precipitate.
SPEEDY	Quick.
SPEEDY	Adjective for a good base runner.

SPEEDY	Swift.
SPEEDY	Like pinch-runners
SPEEDY	Like a cheetah
SPEEDY	Like Mercury
SPEEDY	"... Gonzales," 1962 Boone disk
SPEEDY	Like Gonzales of songdom
SPEEDY	Like Gonzales
SPEEDY	Alka-Seltzer mascot, in bygone ads

SPEEDY	Old Alka-Seltzer mascot
SPEEDY	Zip-zip
SPEEDY	Split-second
SPEEDY	Express
SPEEDY	Alka-Seltzer ad character