Lacking regard for the feelings of others (13)
I believe the answer is:
inconsiderate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lacking regard for the feelings of others</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for inconsiderate that I've seen before include "Lacking thought for others" , "Lacking regard for the feelings of others" , "Careless" , "uncharitable" , "showing no regard for others" .)