Optimal (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">optimal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for best that I've seen before include "most fitting" , "Most advantageous" , "Cream of the crop" , "Optimal" , "Top, finest" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">optimal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ideal that I've seen before include "Paragon" , "Optimal" , "Ailed (anag)" , "In her dreams" , "Coal-mining waste" .)