Campus courtyard (4)
I believe the answer is:
quad
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">campus courtyard</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 quad that I've seen before include "One of four children born at one birth" , "Sort of bike" , "One of four in litter" , "Four-sided courtyard" , "Rectangular area with buildings on all sides" .)