Act of leaving (9)
I believe the answer is:
departure
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">act of leaving</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 departure that I've seen before include "outbound journey?" , "Exit" , "shift" , "Act of leaving" , "change of direction" .)