Clever or smart (4)
I believe the answer is:
neat
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">clever</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">smart</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for neat that I've seen before include "Taken without water" , "Well-trimmed" , "Trim - tidy - without water" , "descendant of 19 [AUROCHS]" , "bull, eg" .)