Most unusual (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">most unusual</span>' is the definition.<br/ ><span class="explanation-format__explanation">(rare can mean unusual or odd)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rarest that I've seen before include "Most scarce or least common" , "Most scarce or uncommon" , "Most scarce and probably precious" , "least done" , "Least common, most unusual" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">most unusual</span>' is the definition.<br/ ><span class="explanation-format__explanation">('odd' can be similar in meaning to 'unusual')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for oddest that I've seen before include "Most rum" , "Queerest" , "Strangest" , "Most peculiar or strange" , "Most strange or curious" .)