According to your description, we are still not clear what the "clear font" is.
In Reporting Services, it support a lot of fonts like Arial, Verdana, Segoe UI, etc. When possible, the PDF rendering extension embeds the subset of each font that is needed to display the report in the PDF file. When the report server generates a report
in PDF format, it uses the information stored in the font referenced by the report to create character mappings within the PDF file. You can directly use these fonts when exporting into PDF. Please refer to Font Embedding in the link below:
Exporting to a PDF File (Report Builder and SSRS)
If you have any question, please feel free to ask.