I would like to have an additional label behind a textfield/combobox, like

"Name" "Combobox" "additional information for this field"

I tried struggling with
Ext.DomHelper.insertAfter( form_panel.form.items.get('id_combobox').el, '<b>extra info</b>');

But the text was squeezed between the Combobox and the tiny arrow-down-image of the combobox.

Any ideas?