Answer: clock

AnswerCrossword Clue
CLOCKTime machine
CLOCKScoreboard fixture
CLOCKClepsydra, e.g.
CLOCKTV's "Beat the ..."
CLOCKWhat a mouse ran up, in a rhyme
CLOCKWhat an antsy person might watch
CLOCKCuckoo ...
CLOCKTimekeeper
CLOCKSlug
CLOCKTicking thing
CLOCKWhat the mouse ran up, in a rhyme
CLOCKBig Ben for one
CLOCKIt has hands and a face
CLOCKTime for speed
CLOCKIt's punched at a factory
CLOCKIt changes hands all the time
CLOCKSomething a cellphone can replace
clockto use up as much game time as possible when one is winning, as to protect a lead in basketball, ice hockey, or football
clockto time with a stop-watch
clockwithout stopping for rest; tirelessly
clockto begin work, esp. by punching a time clock
clockto defeat; vanquish
clockduring all 24 hours; ceaselessly
clockto postpone an official or legal deadline by ceasing to count the hours that elapse, as when a new union contract must be agreed upon before an old contract runs out
clockdevice for telling time
clockto end work, esp. by punching a time clock
CLOCKChronometer
CLOCKUse a stopwatch
CLOCKWord with body or time
CLOCKTicker
CLOCKGrandfather, for one
CLOCKTime
CLOCKTime teller
CLOCK"Beat the ..." (old TV show)
CLOCKTime keeper
CLOCKHit, slangily
CLOCKMeet me under the .....
CLOCKTimepiece on the wall
CLOCKDepot meeting place, perhaps
CLOCKGRANDFATHER'S ..