As the engineers warmed up the engines and adjusted the fuel mix feeding into them the exhaust gradually cleared.

All showed green except the video of the contact camera, which gradually cleared.

The evening breeze was gradually clearing the smoke when they finally found the two men who were supposed to be on watch.

The ozone-tainted air gradually cleared, though the atmospheric recirculators whined in protest.

He realized, as his mind gradually cleared, that the girl had lit the golden sphere and had set it on the log.

This physical discomfort gradually cleared his mind.

When it reached bottom, the usual whirring noise started up, and the air gradually cleared.

It gradually cleared, and became a shimmering silver strand in the sunlight.

Should clear gradually as we pull away.

She moved, slowly, deliberately, and with one pointed foot gradually cleared a space in the moist earth in front of her.