Fourth-year student (6)
I believe the answer is:
senior
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fourth-year student</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 senior that I've seen before include "Elder (of two)" , "High-ranking" , "Higher in rank or age" , "Older or higher in standing" , "Higher in rank or authority" .)