Federated (6)
I believe the answer is:
allied
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">federated</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for allied that I've seen before include "Joined in friendship, treaty, etc" , "Connected, related" , "United through treaty" , "Joined for mutual benefit" , "In league" .)