We managed to resolve this.
In the clarity.min.css file located here: clarity\webroot\ui\uitk\css
we added the below:
}
#export_to_xls{
visibility:hidden;
}
#export_to_ppt{
visibility:hidden;
}
#portlet-header-hide-area-6025010 > span.ppm_button_menu > a:nth-child(4){
visibility:hidden;
display:none;
}
#portlet-header-hide-area-6025010 > span.ppm_button_menu > a:nth-child(5){
visibility:hidden;
display:none;
}
Restarted all services.
This allowed us to hide the icons, as well as the export to excel & power point options in the drop-down menu.