In succession (7)
I believe the answer is:
running
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in succession</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for running that I've seen before include "Managing; flowing" , "in action" , "Managing (a company)" , "Directing" , "cross-country event?" .)