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.”
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.