Neglectful (6)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">neglectful</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for remiss that I've seen before include "Negligent, lax" , "Negligent like misers" , "Not taking care" , "Neglectful" , "Failing in one's duty" .)