How do I add a  after every field element on the node edit form?
The easiest way is using hook_form_alter for each Field add #suffix =&gt; '&lt;div class="clearfix"&gt;&lt;/div&gt;" to the existing FAPI array for the Field. I would just hard code it per field.

If you need to you could make a for loop and walk through the FIELDs so you dont hardcode the fields by hand ... If you were more crazy you could use an #after_build function too on the $form or set 1 per Field element as needed if you run into problems.