Sloppy (3)
I believe the answer is:
lax
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sloppy</span>' is the definition.<br/ ><span class="explanation-format__explanation">(both can careless)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lax that I've seen before include "Flaccid" , "Not sufficiently strict" , "Flabby" , "Loose, careless" , "Casual" .)