Passionless (6)
I believe the answer is:
frigid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">passionless</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for frigid that I've seen before include "Passionless, unresponsive" , "Very cold in manner" , "far from warm" , "Frozen" , "Glacial" .)