Unimprovable (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unimprovable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ideal that I've seen before include "Very eager (to see)" , "example" , "just the job" , "Pattern" , "(the best one can get)" .)
(Other definitions for ultimate that I've seen before include "The final point" , "Last, final or extreme" , "something extreme" , "Utmost; last" , "Last possible, final" .)