Technical language (6)
I believe the answer is:
jargon
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">technical language</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for jargon that I've seen before include "Technical language" , "Language specific to an activity" , "technical chat" , "Specialised vocabulary of a particular group" , "Professional gibberish" .)