The sample code below will add a Clear Prompts link to any TEXT section on your dashboard. Note you'll need to Replace the [] with <>.
[div class="XUIPromptEntry minibuttonOn"][href="#" onclick="return PersonalizationEditor.removeDefaultSelection(false)" /]Clear Prompts[/href="#"][/div]
[div class="XUIPromptEntry minibuttonOn"][href="#" onclick="return PersonalizationEditor.removeDefaultSelection(false)" /]Clear Prompts[/href="#"][/div]