In close proximity to (4)
I believe the answer is:
near
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">in close proximity to</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 near that I've seen before include "(Get) close to" , "A short distance away" , "Within reach" , "Close in time or place" , "Almost; approach" .)