my podcast was deleted in itunes store

you need to select this in your podcast if you have auto-delete enabled.

If your podcast is rejected on its initial submission, or removed once it's appeared in the Store, this can be for a variety of reasons - see the list at https://help.apple.com/itc/podcasts_connect/#/itc8a10a0c56. If you attempt to resubmit you are likely to be told that the feed has already been submitted (submission of a previously submitted feed URL or podcast title is not allowed). What you do about it depends on the reason for rejection. The most common reason for rejection is when a podcast consists of 'mixes' or plays of commercially issued recordings - this is a breach of copyright and is thus not allowed.

Obviously you must first locate and deal with the problem. In some cases, such as difficulty accessing the feed or media files, being in the wrong category, etc., you can go to Podcasts Connect and resubmit your feed. However some reasons for rejection will mean you cannot resubmit the podcast and it will be dimmed out in the dashboard at Podcasts Connect. In this case you will either have to contact Support and request reactivation, or change the feed URL and the podcast title and resubmit it as a new feed (which will lose any rankings, reviews, etc.). To contact Support go to https://itunespartner.apple.com/en/podcasts/overview and click the 'Contact Us' link at the bottom of the page.

I agree that when they reject a podcast they should say why - you should have received an email saying it had been removed but usually with no reason given. Check to make sure everything is OK and then see if you can resubmit in Podcasts Connect. We don't know that your short clip was indeed the reason but you could try deleting it and see what happens.