ingenious

Of a person, displaying genius, ingenuity or brilliance; inventive.

• This fellow is ingenious; he fixed a problem I didn’t even know I had.

Of a thing, characterized by genius; cleverly contrived or done.

• That is an ingenious model of the atom.

Showing originality or sagacity; characterized by ingenuity; witty.

• He sent me an ingenious reply to an email.