Ok, so my logic was flawed and full of holes. I'm not Vulcan, but I'll give it another try...
You are trying to find out what is the 'opposite' of a clock, and by definition the 'opposite' of a clock cannot itself be a clock.
Well,
I am
not a clock, and therefore
must be it's opposite!
So the answer to the question "What is the opposite of a clock?" is
Me!
