Answer:

OCLOCK

Answer	Crossword Clue
OCLOCK	"One .. Jump"
OCLOCK	It follows twelve, but not thirteen
OCLOCK	Last word of "Wee Willie Winkie"

OCLOCK	Four-.. (flower)
OCLOCK	"Twelve ... High" (1949 movie)
OCLOCK	Five ... shadow
OCLOCK	Time-teller's contraction
OCLOCK	Word of the hour?
OCLOCK	"... ten ... scholar"
OCLOCK	Time piece?
OCLOCK	Word that may follow the numbers one through twelve

OCLOCK	It can be 1 through 12
OCLOCK	"One .. Jump" (Basie theme)
OCLOCK	Time term
OCLOCK	"One ... Jump"
OCLOCK	Time word.
OCLOCK	"Thirteen ...," Benet book.
OCLOCK	Time term.
OCLOCK	Timely word.

OCLOCK	A.M. or P.M.
OCLOCK	"Well, but what's ...?": Richard III
OCLOCK	"A ten ... scholar"
OCLOCK	End of time
OCLOCK	Five -- shadow
OCLOCK	Slash's Snakepit "It's 5 ... Somewhere"
OCLOCK	"Twelve ..... High"
OCLOCK	Twelve .... High

OCLOCK	You may say it after the hour
OCLOCK	Word with any number from 1 to 12
OCLOCK	Time word
OCLOCK	"Hundred," to nonmilitary types
OCLOCK	The end of time?