Most slender (8)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">most slender</span>' is the definition.<br/ ><span class="explanation-format__explanation">('thin' can be a synonym of 'slender')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for thinnest that I've seen before include "Most fine" , "Superlatively poor" , "Most slim" , "Most slender as in tenths" , "Narrowest or leanest" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">most slender</span>' is the definition.<br/ ><span class="explanation-format__explanation">('lean' can be similar in meaning to 'slender')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for leanest that I've seen before include "most meagre type" , "Least fat" , "Most thin" , "Most skinny" , "Poorest-quality" .)