This article covers starting a ClamAV scan.
A ClamAV scan can be started for a cPanel account in the following location of the cPanel interface for the account.
Home > Advanced > Virus Scanner
A ClamAV scan can also be started from the command line with a command similar to the following.
/usr/local/cpanel/3rdparty/bin/clamscan -ir /home/USERNAME/public_html