Pls, in the folowing html tree, i would like to select only the 'dt' whose class be "dtSelected" whose son is 'a' whose class is 'clicked'.
After this i would like to apply to this "dt" an other class (i know to do this, but first i need to find out how get it in that context).

Here the complete html tree and the element (highlighted) that i want select.

ty for help and patience!

         

          
<dl>
       <dt>
           <a onclick="#'" href="E">Aniversariantes</a>
       </dt>
       <dt class="dtSelected">
            <a href="#" class="clicked">Informações de RH</a>
       </dt>
           <dd>
                 <ul>
                     <li>
                           <a href="#">Avaliação de Competências e Desempenho</a>
                           <a href="#">Benefícios</a>
                           <a href="#">Convêncios Educacionais</a>
                           <a href="#">Conveniências</a>
                           <a href="#">Remuneração</a>
                    </li>
                 </ul>
           </dd>
</dl>