Adam Clarke on Romans 15:23

But - having no more place in these parts - Having nothing farther at present that I can do - for τοπον εχειν signifies not merely to have a place of residence, or the like, but convenience, opportunity; which is a frequent meaning of the phrase among the best Greek writers - having no large place or city, where Christianity has not yet been planted, in which I can introduce the Gospel. The apostle was then at Corinth; and having evangelized all those parts, he had no opportunity of breaking up any new ground.