Answer:

blink

Answer	Crossword Clue
BLINK	Flicker
BLINK	Nictitate
BLINK	Get outglared?

BLINK	Respond to sunglare
BLINK	Bat both eyes
BLINK	Eyelash flutter
BLINK	First one to ... (loser)
BLINK	Shine intermittently, as a light
BLINK	Show surprise
BLINK	Back down
BLINK	Norwegian freighter sunk off Atlantic coast.

BLINK	Brief flash.
BLINK	Twinkle.
BLINK	Disregard (with "at").
BLINK	React to sunlight
BLINK	On the ... (out of order)
BLINK	Trice
BLINK	Go on and off, as a traffic light
BLINK	Go on and off, as a light

BLINK	Lose one's nerve
BLINK	Flip one's lid?
BLINK	Lose a staring contest
BLINK	Lose in a confrontation, maybe
BLINK	...-182
BLINK	Clean one's eyes
BLINK	Miss the action, maybe
BLINK	Shine intermittently

BLINK	Glimmer
BLINK	Book subtitled "The Power of Thinking Without Thinking"
BLINK	Back down, figuratively
BLINK	2005 Malcolm Gladwell book
BLINK	Lose in a staring contest