1916 battle site (5)
I believe the answer is:
somme
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">1916 battle site</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for somme that I've seen before include "bloody fight" , "WW1 battle site" , "French river at Amiens" , "World War One battle region" , "French river, scene of 1916 battles" .)