Sang-froid (6)
I believe the answer is:
aplomb
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sang-froid</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for aplomb that I've seen before include "Self-satisfied dignity, complacency" , "Pompous dignity or poise" , "Self-satisfied assurance" , "Self-satisfied poise" , "coolness is required" .)