Clownish, madcap (4)
I believe the answer is:
zany
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">clownish</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that clownish can be written as zany)</span><br/ ><br/ >'<span class="explanation-format__original">madcap</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ ></span>
(Other definitions for zany that I've seen before include "old assistant clown" , "Comically eccentric" , "Left-field - foolish" , "Like a buffoon" , "Amusingly idiosyncratic" .)