General intelligence:
* אַ קלוגער מאַן (a klugér man): This is the most straightforward translation, literally meaning "a clever man." It implies general intelligence and understanding.
* אַ שׂכל־קַדּוש (a seichel-kadosh): This is a more formal and respectful way to say "a wise man" or "a man of great intellect." It emphasizes wisdom and knowledge.
Other qualities:
* אַ שׂכל־יִישׁ (a seichel-yish): This phrase literally means "a man of intellect," and it implies a practical and resourceful mind.
* אַ קלוגער קאָפּ (a klugér kop): This literally means "a clever head," and it implies a sharp mind and quick thinking.
Sarcastic or humorous:
* אַ קלוגער קאַץ (a klugér katz): This literally means "a clever cat," and it's used sarcastically to imply someone is not as smart as they think they are.
The best choice depends on the context and the specific connotation you wish to convey.