Meaning of 悧 in Japanese

しかし、トニーは利口な少年ではありませんでした。
But Tony was not a clever boy.

そういう相手の前では、私の見せ掛けだけの怜悧な技術は、見抜かれた時に負けていたと思う。
I think that against somebody like that, my seemingly clever techniques would be seen through and then I would be defeated.