under cover

But quickly, while she was still under cover of the night.

You're going to have to stay under cover for a while.

The best plan for the moment was to stay under cover, watch, and wait.

They can keep themselves under cover and be on us!

But get the men who are watching the house, and keep them under cover.

They could get back, and most of the way was under cover.

She then worked in a department store before going into government work and what would be, until recently, a life under cover.

The next evening they set out again under cover of dark.

What followed was a change of his name and life under cover.

And we were under cover when the sun came out.