Not accurate (7)
I believe the answer is:
inexact
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not accurate</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for inexact that I've seen before include "estimated?" , "Fuzzy, muddled" , "Not precise, like some sciences" , "Wide of the mark" , "Lax" .)