have it in one

Have the ability to accomplish something. As Sir Arthur Conan Doyle put it in A Study in Scarlet (1887), “I know well that I have it in me to make my name famous.”

Words nearby have it in one

have in one's hands, have it, have it both ways, have it coming, have it in for, have it in one, have it made, have it out, have kittens, have no business, have no heart for