give a sign
make a sign

Still I think she gave you the sign for we are going out.

When I give you the high sign, come on out.

The other two are saying they will give support but not sign.

He saw me but gave no sign of doing so.

If the shot found its mark she gave no sign.

The girl must have heard him but she gave no sign.

But if the women heard him, they gave no sign.

Then he turned back to me, giving no sign of having heard what I said.

"I drive down the street and people give me the high sign."

Green gave him the okay sign, and they set off again.