Sure, I can guide you on how to clear your Apple Podcast history. Here are the steps:

1. Open the Podcasts app on your iPhone or iPad.
2. Tap on the "Library" tab at the bottom of the screen.
3. Now, tap on "Shows" under the Library.
4. From the list of shows, tap on the one for which you want to clear the play history.
5. Once you're on the show's page, tap on the three-dot icon at the top right corner of the screen.
6. From the menu that appears, tap on "Remove...".
7. Finally, tap on "Remove Download" to clear the history.

Please note that this will only remove the downloaded episodes from your device. The play history for the show will still be available on other devices where you're signed in with the same Apple ID. Unfortunately, as of now, Apple does not provide an option to clear the play history completely.