Imperfect (6)
I believe the answer is:
flawed
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">imperfect</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 flawed that I've seen before include "Containing blemish or imperfection" , "Blemished; faulty" , "wrong" , "with a hole in it" , "Having blemish or defect" .)