Send word (6)
I believe the answer is:
notify
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">send word</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for notify that I've seen before include "Advise, apprise" , "Formally inform" , "Make known" , "No one" , "Declare" .)