Grossly insensitive (5)
I believe the answer is:
crass
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">grossly insensitive</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 crass that I've seen before include "Witless" , "Unrefined" , "Indelicate" , "Blundering" , "Tactless, boorish" .)