Answer: punchaclock

AnswerCrossword Clue
PUNCHACLOCKLog in at the job
PUNCHACLOCKBegin work, perhaps
PUNCHACLOCKWork
PUNCHACLOCKUse timecards at work
PUNCHACLOCKStrike back at Big Ben?
PUNCHACLOCKProve you worked