something in it
Some element of truth to something. We just got a tip that the mayor may not run in the fall. I want you to find out if there is something in it. Don't just dismiss what he said because it sounded sarcastic—there's probably something in it.
anything/nothing/something ˈin it
any/no/some truth in what is being said: ‘Is there anything in the story that he is leaving the company?’ ‘No, I’m sure there’s nothing in it.’/‘Yes, I think there’s something in it.’