have it in one

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
Farlex Dictionary of Idioms.

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
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • have it in (one)
  • have it in (one) to (do something)
  • have it in one to do
  • have it in you
  • have it in you to do something
  • have something to offer
  • have (something) to offer
  • be every inch a/the (something)
  • every inch the (something)
  • inherit (something) from (someone)