Political party (6)
I believe the answer is:
labour
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">political party</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 labour that I've seen before include "Hard physical work" , "End of term" , "opposition" , "Productive work" , "Shakespeare: 'Love's ...... Lost'" .)