have it in one

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have it in (one)

To have or possess a specific skill or trait. Wow, Alice is a beautiful singer—I didn't know she had it in her. Honestly, I'm not sure he has it in him to deal with this.
See also: have

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."
See also: have, one
References in periodicals archive ?
because they have it in their homes, they're the targets of theft,'' he said.