The > is a child selector. So if your HTML looks like this:
<h1 class="hc-reform">
title
<p>stuff here</p>
</h1>
... then that's your ticket.
But if your HTML looks like this:
<h1 class="hc-reform">
title
</h1>
<p>stuff here</p>
Then you want the adjacent selector:
h1.hc-reform + p{
clear:both;
}