Definition of "clock in"

clock in

verb
third-person singular simple present clocks in, present participle clocking in, simple past and past participle clocked in
1. (US) To begin working time, especially by punching in (entering a workplace by punching a time card with the time clock).
2. (idiomatic) To be measured at.
  Quotations
  Night falls and on come the Grateful Dead, who begin with St Stephen, a pretty song, largely instrumental, that clocks in at two minutes
  2019 August 15, Bob Stanley, “'Groovy, groovy, groovy': listening to Woodstock 50 years on – all 38 discs”, in The Guardian‎