Clockwork isn't an idiom that I'm aware of. The work means something that is mechanical, driven by old-fashioned gears and wheels. It can also mean something that runs as smoothly as if mechanical, or something repetitive and mechanical-seeming.
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jump a lots
To talk fast.
to want to do something; a wanting to entertain oneself
It's not really an idiom - "to account" is to tally up, add together, or count everything, so if you take something into account, you're adding the information into the whole.
An asterisk is not an idiom. It is a punctuation mark. It looks like a little star *