Undiluted (4)
I believe the answer is:
neat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">undiluted</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for neat that I've seen before include "Bovine animal" , "Clean and tidy" , "farm animals" , "Very good American" , "As whisky may be" .)