on the clock

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective literally Displayed on the dial of a clock (timepiece).
• adjective idiomatic Working at one's job; occupied in some manner during one's hours of remunerated employment.
• adjective idiomatic Of a taxicab, engaged for hire; displayed numerically as time or fare on the meter of a taxicab.
• adjective sports In the official time remaining in a game or other sporting event.
• adjective sports In the official time expired in a game or other sporting event.
• adjective of a motor vehicle Displayed numerically on the mileage or kilometric gauge.
• adjective Remunerated per unit of time.
• adverb idiomatic During one's official working hours; in or into a position of remunerated employment.