Can I delete a duplicate credit card charge that did not clear?

It's good to see you here in the Community, @ross291.

I'm here to help delete duplicate credit card charges in QuickBooks Online (QBO).

If this duplicate credit card charge is downloaded from your bank, you can exclude it from the Banking page. Here's how:

1. Sign in to your QBO account.
2. Click Banking from the left menu.
3. Select the appropriate bank account.
4. In the For review tab, find and select the duplicate credit card charge. 
5. Then, click Exclude.

I'm adding this article for more guidance: Exclude a bank transaction you downloaded into QuickBooks Online.

However, if you manually created this transaction, you can go to your bank register and delete it from there. Let me guide you how.

1. Click the Gear icon, then select Chart of accounts.
2. Select the bank account and click View register.
3. Locate and select the created credit card charge. Then, click Delete.
4. Click Yes to confirm.

You might want to learn more about processing credit card payments in QBO. This article will help you through the process: Process a credit card payment in QuickBooks Online.

Please let me know if you need further assistance deleting credit card charges. I'll be standing by for your response, @ross291.