o, k, l, n, c are letters that make 'clock on'
clock, cl, on, lock, Cl are words within 'clock on'
1 possible definitions for 'clock on'
Under this definition, clock on is a verb and has the following properties:
clock in, punch in have the same meaning as 'clock on'
clock out, punch out, clock off have the opposite meaning of 'clock on'
'clock on' can be a type of record, enter, put down.