Research site (3)
I believe the answer is:
lab
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">research site</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 lab that I've seen before include "Experimental facility" , "Dog" , "Scientific research space, in short" , "In brief, a room for scientific experiments" , "Socialist" .)