Answer:

GETSET

Answer	Crossword Clue
GETSET	"Go!" preceder
GETSET	Prepare
GETSET	Words before go

GETSET	Prepare to go
GETSET	Words after "On your mark"
GETSET	Shout shortly before a race
GETSET	Be ready (for)
GETSET	It follows "On your mark"
GETSET	Starter's words
GETSET	It follows "On your mark!"
GETSET	Phrase before "Go!"

GETSET	Phrase heard before the starter's gun
GETSET	Gear up
GETSET	Words before "Go!"
GETSET	"On your mark" follower
GETSET	Prepare oneself
GETSET	Make preparations
GETSET	Just before "Go!"
GETSET	"Ready, ..., go!"

GETSET	Starter's phrase.
GETSET	Words to a starting racer
GETSET	Prepare to start
GETSET	Race-starting words
GETSET	" . . . ..., go!"
GETSET	Starter's phrase
GETSET	Command before "Go!"
GETSET	Prepare (for)

GETSET	"Brace yourself!"
GETSET	Gird oneself
GETSET	Ready
GETSET	Words before "go"
GETSET	"Go" preceder
GETSET	Make ready
GETSET	"Places please!"