Like clockwork, a man in a hunting jacket descended on me and began to yell.
Every summer, the grim news reports roll out like clockwork.
But Belle finds a way to get back, and like clockwork, her beast transforms from hideous to hot.
also clock-work, 1660s, "mechanism of a clock," from clock (n.1) + work (n.). Figurative sense of "anything of unvarying regularity" is recorded earlier (1620s).