clockwork
Concise Oxford English Dictionary © 2008 Oxford University Press:
clockwork/ˈklɒkwɜːk/
▶noun a mechanism with a spring and toothed gearwheels, used to drive a mechanical clock, toy, or other device.
– phrases
like clockwork very smoothly and easily.
like clockwork very smoothly and easily.
'clockwork' also found in these Oxford entries:

