break cover

This had the effect of causing the fourth lion to break cover and leap upon a rock as the first had done.

If the bombardment was ineffective, from whatever cause, then the men should not have been allowed to break cover.

Stationing the men around where the bear was likely to break cover, I went in with the dogs to drive him out.

The sergeant was hastily sending out our squad to investigate the birches, when a bunch of men were seen to break cover from them.

He was fairly run to earth, and did not break cover again that night, you may be sure.