Under way (5)
I believe the answer is:
begun
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">under way</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 begun that I've seen before include "Opened" , "(Has) started" , "Commenced" .)