The fiendishly clever maneuvers can't mask the preposterousness of the background story.

Had to be something fiendishly clever, whatever it was, but when was he going to share it?

For the repackaging business, the concept is fiendishly clever.

That had been a daring, and a fiendishly clever, thing to do.

And they'll learn some fiendishly clever pranks along the way.

Fiendishly clever of Meister, or whatever his real name is, wouldn't you say?

And very soon I realized that I was up against something particularly difficult and someone fiendishly clever.

It could all be a fiendishly clever inside job of course.

It's a fiendishly clever system for making sure the human race continues and most people over twenty never have a tranquil moment.

The man behind this is not only deadly, he is fiendishly clever.