partnership (8)
I believe the answer is:
alliance
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">partnership</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for alliance that I've seen before include "The joining by political agreement or treaty" , "Association for mutual benefit" , "Combination by treaty" , "Kind of partnership with canaille" , "Formal agreement" .)