Hiya,
I was able to resolve this (I wanted the page title to display but not the description so slightly opposite to your query!) by injecting this into the header code for the specific page:
<style> .page-description { display: none } </style>
I also wanted to hide the page title on a specific page so just switched in the .page-title for that one ie:
<style> .page-title { display: none } </style>
This does mess with the banner height a little but I'm working on that......!
I know this is an old question but it might help people like me who are scouring for answer :)