Roulette bet (4)
I believe the answer is:
noir
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">roulette bet</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for noir that I've seen before include "film genre" , "Film featuring bleak settings and cynical characters" , "type of film" , "(Of film or fiction) with bleak settings and cynical characters" , "Kind of dark film" .)