This turbulent ruler was a very go-ahead monarch indeed. He organised a splendid army, well-drilled and well-equipped with modern arms.
You can start as soon as you get the go-ahead from the president.
The pitcher gave up the go-ahead run in the top of the ninth inning.
... ran for office, he said if you build a coal plant, you can go ahead, but you'll go bankrupt. ...
... happens ahead of you. ...