Academic acronym (4)
I believe the answer is:
stem
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">academic acronym</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 stem that I've seen before include "Central upright part of flower or drinking glass" , "part of pipe" , "Tube" , "Stalk - check" , "branch of family" .)