Second-year student, for short (4)
I believe the answer is:
soph
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">second-year student for short</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for soph that I've seen before include "Second year student" , "Student, not a fresher" .)