Engage in conversation (9)
I believe the answer is:
discourse
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">engage in conversation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for discourse that I've seen before include "Formal discussion of a topic" , "Engage in conversation; debate" , "Speech - conversation" , "verbal communication" , "Communication verbally" .)