I don't think I know any clean jokes
The only clean jokes I know of are really painful dad jokes. And I say this knowing way more adult and dirty dad jokes than clean ones. Clean humor sucks, like really bad, for the most part. Like it tries to tackle potentially uncomfortable issues, but it skirts around it at the last second and shoots itself in the foot.
On the topic of humor, I'm rather fond of visual humor.

If that's "indecent", then I'll eat my hat.
Joke's on you though, I don't own any hats.