Free from obstructions (5)
I believe the answer is:
clear
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">free from obstructions</span>' is the definition.<br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for clear that I've seen before include "Empty - vault" , "Distinct - obvious" , "Understandable" , "Plainly" , "School near Windsor" .)