Using Clearpay won’t affect your credit score as payment reference agencies aren’t informed of late or missed payments. https://site-assets.afterpay.com/en-GB/responsible-spending
Just one more thing...
Clearpay is an independent payment provider and WUKA have no influence over whether your payment will be accepted or not. If you have any trouble placing an order with Clearpay, please contact Clearpay Customer Service.