1. there is no danger of being seen.

We had to wait until the coast was clear to slip out of the building, which was being watched.

2. there is no danger of anything more happening, esp. trouble.

Now that the killer has been arrested, the coast is clear and people can go out without fear.

• have been around a bit
• have been in the wars
• have big ears
• have bigger fish to fry
• have blinders on
• have blood on hands
• have blood on your hands
• have both feet on the ground
• have burning a hole in pocket
• have burning a hole in your pocket
• have butterflies
• have butterflies in stomach
• have butterflies in your stomach
• have by the balls
• have by the short and curlies
• have cake and eat it
• have cake and eat it too
• have carte blanche
• have clean hands
• have come a long way
• have coming out ears
• have coming out of ears
• have coming out of your ears
• have coming out your ears
• have day in court