One who bets (7)
I believe the answer is:
gambler
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one who bets</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 gambler that I've seen before include "one who takes chances!" , "One who takes risks" , "One who bets" , "Casino punter" , "Speculator" .)