Description of problem: ClearSilver and ClearSilver-devel packages are not (yet) available for EPEL 8. Also note that there is a new upstream version available, see https://apps.fedoraproject.org/packages/clearsilver/bugs/
Will do.
FEDORA-EPEL-2019-78217605fe has been submitted as an update to Fedora EPEL 8. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-78217605fe
clearsilver-0.10.5-56.el8 has been pushed to the Fedora EPEL 8 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-78217605fe