Careless, unsystematic (9)
I believe the answer is:
haphazard
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">careless</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >'<span class="explanation-format__original">unsystematic</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ ></span>
(Other definitions for haphazard that I've seen before include "Lacking order" , "Erratic" , "Careless or random" , "Slapdash, slipshod" , "Disorganised, random" .)