Least common (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">least common</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 oddest that I've seen before include "Queerest" , "Most strange or curious" , "Most peculiar or uneven" , "Most unusual or uneven" , "Most eccentric or peculiar" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">least common</span>' is the definition.<br/ ><span class="explanation-format__explanation">('rare' is the opposite of 'common' so 'rarest' should be a synonym for 'least common')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rarest that I've seen before include "Most scarce and probably precious" , "Most scarce or least common" , "Least common, most unusual" , "Most scarce or uncommon" , "fine to maximum" .)