Least distant (7)
I believe the answer is:
nearest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">least distant</span>' is the definition.<br/ ><span class="explanation-format__explanation">('near' is the opposite of 'distant' so 'nearest' should be a synonym for 'least distant')</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nearest that I've seen before include "Next" , "With dearest, they're our loved ones" , "Most intimate" , "Closest among relatives" , "Rat seen (anag.)" .)