Confined to college (5)
I believe the answer is:
gated
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">confined to college</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 gated that I've seen before include "Kept in as punishment" , "Confined to college" , "Confined to school" , "kept in school" , "deprived of liberty for a while" .)