have it in you

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 ˈin you (to do something)

have the unexpected ability, determination, courage, etc. to do something: She managed to finish the crossword all on her own! I didn’t know she had it in her!
See also: have