clear sign
obvious sign

On the following day, the first clear sign of danger appeared.

My mother's pumping hand, for example, seemed to us a clear sign of physical pain.

But there have been no clear signs that the two sides will actually come together.

A clear sign that our social market policies are the right ones to put England back on its feet again.

A clear sign for the male to increase his activities.

It was a clear sign of secrets to anyone who saw.

We would leave a clear sign for them to follow.

They would give no clear sign, though I begged for it.

A clear sign they were probably on the right path.

There are clear signs too that both sides mean business.