[WP] The local magician that puts on shows in their community gets hunted down by the government for being able to actually use magic

The Man Who Was Magic, by Paul Gallico has a similar premise.

People Will Talk is a Cary Grant movie that is an absolutely wild ride, but one of the subplots kind of rhymes with that.

Depending on your approach, you might want to check those out, or be sure to avoid them. 😆 It's one of those premises where there is always room.