Answer:

daylight

Answer	Crossword Clue
DAYLIGHT	1996 Sylvester Stallone disaster movie set in a tunnel under the Hudson River
DAYLIGHT	The D in DST.
DAYLIGHT	There's more in the summertime.

DAYLIGHT	Part of DST.
DAYLIGHT	Dawn.
DAYLIGHT	Part of D. S. T.
DAYLIGHT	Publicity, figuratively.
DAYLIGHT	Summer time.
DAYLIGHT	Vampire's undoing