All day and all night. For Example: If someone were to say “I’ve been working round the clock,” they are saying they’ve been working non stop.

To avoid something. For Example: “I would recommend steering clear of that road, there’s a lot of construction going on right now.”

Not guilty of an offense or unobstructed by something undesirable. For Example: If someone is worried they might have their taxes audited but the date by which they expected to be audited comes and goes, they might say, “phew, I think I’m in the clear.”

Completely clean. When used in reference to a person it means they are very honest or good-hearted. For Example: “Jim would never steal from the company, he’s a squeaky clean sort of guy.”

To return to the situation or beliefs you originally had. For Example: If a movie starts off in the past, comes back to the present and then ends back in the past, you could say that the movie “came full circle at its ending.”